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POPL 2026 Last Call for Papers
by Ningning Xie 04 Jul '25

04 Jul '25

PACMPL Issue POPL 2026 seeks contributions on all aspects of programming languages and programming systems, both theoretical and practical. Authors of papers published in PACMPL Issue POPL 2026 will be invited to present their work in the POPL conference in January 2026, which is sponsored by ACM SIGPLAN, in cooperation with ACM SIGACT and ACM SIGLOG. POPL 2026 Website: https://popl26.sigplan.org/ Call for Papers: https://conf.researchr.org/track/POPL-2026/POPL-2026-popl-research-papers Submission deadline: July 10 2025 AOE Double-Blind Review FAQ: https://conf.researchr.org/track/POPL-2026/POPL-2026-popl-research-papers#d… ### Organization Conference Location: Rennes, France Conference Dates: January 11-17, 2026 General Chair: Sandrine Blazy, University of Rennes Program Chair: Suresh Jagannathan, Purdue University Program Committee: https://popl26.sigplan.org/committee/POPL-2026-popl-research-papers-program… ### Scope Principles of Programming Languages (POPL) is a forum for the discussion of all aspects of programming languages and programming systems. Both theoretical and experimental papers are welcome, on topics ranging from formal frameworks to experience reports. We seek submissions that make principled, enduring contributions to the theory, design, understanding, implementation, or application of programming languages. ### Evaluation Criteria The Review Committee will evaluate the technical contribution of each submission as well as its accessibility to both experts and the general POPL audience. All papers will be judged on significance, originality, relevance, correctness, and clarity. Each paper must explain its scientific contribution in both general and technical terms, identifying what has been accomplished, explaining why it is significant, and comparing it with previous work. Advice on writing technical papers can be found on the SIGPLAN author information page: https://www.sigplan.org/Resources/Author/. Deadlines and formatting requirements, detailed below, will be strictly enforced. ### Double-Blind Reviewing Process POPL 2026 will use a full double-blind reviewing process (similar to the one used in recent years (POPL 2023 - 2025) but different from the lightweight double-blind process used before then). This means that identities of authors will not be made visible to reviewers until after conditional-acceptance decisions have been made, and then only for the conditionally-accepted papers. The use of full double-blind reviewing has several consequences for authors. * **Submissions**: Authors must omit their names and institutions from their paper submissions. In addition, references to authors’ own prior work should be in the third person (e.g., not “We build on our previous work …” but rather “We build on the work of …”). * **Supplementary material**: Authors are permitted to provide supplementary material (e.g., detailed proofs, proof scripts, system implementations, or experimental data) along with their submission, which reviewers may (but are not required to) examine. This material may take the form of a single file, such as a PDF or a tarball. Authors must fully anonymize any supplementary material. * **Author response**: In responding to reviews, authors should not say anything that reveals their identity, since author identities will not be revealed to reviewers at that stage of the reviewing process. * **Dissemination of work under submission**: Authors are welcome to disseminate their ideas and post draft versions of their paper(s) on their personal website, institutional repository, or arXiv (reviewers will be asked to turn off arXiv notifications during the review period). But authors should not take steps that would almost certainly reveal their identities to members of the Program Committee, e.g., directly contacting PC members or publicizing the work on widely-visible social media or major mailing lists used by the community. The purpose of the above restrictions is to help the Program Committee and external reviewers come to a judgment about the paper without bias, not to make it impossible for them to discover the authors’ identities if they were to try. In particular, nothing should be done in the name of anonymity that weakens the quality of the submission. However, there are occasionally cases where adhering to the above restrictions is truly difficult or impossible for one reason or another. In such cases, the authors should contact the Program Chair to discuss the situation and how to handle it. The FAQ on Double-Blind Reviewing addresses many common scenarios and answers many common questions about this topic. But there remain many grey areas and trade-offs. If you have any doubts about how to interpret the double-blind rules or you encounter a complex case that is not clearly covered by the FAQ, please contact the Program Chair for guidance. ### Evaluation Process POPL 2026 will have five Associate Chairs who will help the PC Chair monitor reviews, solicit external expert reviews for submissions when there is not enough expertise on the committee, and facilitate reviewer discussions. As in previous years, authors will have a multi-day period to respond to reviews, as indicated in the Important Dates table. Responses are optional. A response must be concise, addressing specific points raised in the reviews; in particular, it must not introduce new technical results. Reviewers will write a short reaction to these author responses. The Review Committee (RC) will discuss papers electronically, and will use synchronous virtual meetings to discuss any papers for which there is disagreement among reviewers, in some cases soliciting additional input from other experts in the committee. There is no formal External Review Committee, though experts outside the committee may be consulted for some papers. Reviews will be accompanied by a short summary of the reasons behind the committee’s decision with the goal of clarifying the reasons behind the decision. To conform with ACM requirements for journal publication, all POPL papers will be conditionally accepted; authors will be required to submit a short description of the changes made to the final version of the paper, including how the changes address any requirements imposed by the Review Committee. That the changes are sufficient will be confirmed by the original reviewers prior to acceptance to POPL. Authors of conditionally accepted papers must submit a satisfactory revision to the Review Committee by the requested deadline or risk rejection. For additional information about the reviewing process, see: [Principles of POPL](https://www.sigplan.org/Conferences/POPL/Principles/), a presentation of the underlying organizational and reviewing policies for POPL. For POPL 2026, policies specified in this Call for Papers supersede those in the Principles of POPL document. ### Submission Site Information The submission site is https://popl26.hotcrp.com. Authors can submit multiple times prior to the deadline. Only the last submission will be reviewed. There is no abstract deadline. The submission site requires entering author names and affiliations, relevant topics, and potential conflicts. Addition or removal of authors after the submission deadline will need to be approved by the Program Chair (as this kind of change potentially undermines the goal of eliminating conflicts during paper assignment). The submission deadline is 11:59PM July 10, 2025 anywhere on earth (AOE): https://en.wikipedia.org/wiki/Anywhere_on_Earth ### Conflicts of Interest For each submission, the authors must make sure that they properly declare all potential conflicts of interest for all of the authors of that submission. This includes marking PC conflicts as well as “Other Conflicts (external)”. A conflict caught late in the reviewing process leads to a voided review which may be infeasible to replace. Conflicts should be declared between an adviser and an advisee (e.g., Ph.D., post-doc; forever), between an author and a co-author (papers and proposals; for two years), between people at the same institution (branches of large companies or different locations of research institutes are considered to be the same institution; for two years after leaving an institution), between people with financial conflicts of interest, and between friends or relatives. If a possible reviewer does not meet the above criteria, please do not identify him/her as conflicted. Doing so could be viewed as an attempt to prevent a qualified, but possibly skeptical reviewer from reviewing your paper. If you nevertheless believe that a reviewer who does not meet the above criteria is conflicted, or if you are unsure about a possible conflict, you may identify the person and send a note to the PC Chair. Declaring a spurious conflict with the aim of excluding otherwise qualified reviewers can be grounds for desk rejection. ### Submission Guidelines Prior to the paper submission deadline, authors should upload their full anonymized paper. Here are some key requirements concerning paper submissions: * Each paper should have no more than **25 pages of text, excluding bibliography**, using the PACMPL format (specifically, the `acmart` LaTeX class with `acmsmall` option). It is a single-column page layout with a 10 pt font, 12 pt line spacing, and wider margins than recent POPL page layouts. In this format, the main text block is 5.478 in (13.91 cm) wide and 7.884 in (20.03 cm) tall. Use of a different format (e.g., smaller fonts or a larger text block) is grounds for summary rejection. The PACMPL template for LaTeX can be found at the [SIGPLAN author information page](https://www.sigplan.org/Resources/Author/), and further information about PACMPL submissions can be found on the [PACMPL author guidelines page](https://dl.acm.org/journal/pacmpl/author-guidelines). PACMPL does not support submissions in Microsoft Word. * We strongly encourage use of the `review` and `screen` options in order to make submissions easier to review. * Authors may choose which citation format they wish to use, which can be either author-year (the mandate for final versions in previous years) or numeric. * Submissions should be in PDF and printable on both US Letter and A4 paper. Papers may be resubmitted to the submission site multiple times up until the deadline, but the last version submitted before the deadline will be the version reviewed. * Submitted papers must adhere to the [SIGPLAN Republication Policy](https://www.sigplan.org/Resources/Policies/Republication/) and the [ACM Policy on Plagiarism](https://www.acm.org/publications/policies/plagiarism-overview ). Concurrent paper submissions to other conferences, workshops, journals, or similar forums of publication are not allowed. * Authors are free to submit supplementary material along with their submissions, but it must be fully anonymized. * Authors must list all their conflicts of interest (both PC conflicts and external conflicts) in the HotCRP submission form. * Authors may include additional information in a field of the HotCRP submission form labeled "Confidential Comments for the Program Chair". This information need not be anonymized. It can be used to inform the Program Chair, for example, about sensitive issues concerning a conflict with a PC member or about supplementary material that cannot be anonymized. It is left to the discretion of the Program Chair what to do with this information. * If for some reason an author feels uncomfortable discussing a sensitive issue with the Program Chair (or communicating via the "Confidential Comments" field in HotCRP), they should feel free to get in touch instead with any of the Associate Chairs, with whom they can discuss the issue in confidence. * Submissions from PC members and Associate Chairs (except the Program Chair) are permitted and will not be handled any differently than other submissions. This is in accordance with a recent change in policy approved by the SIGPLAN Executive Committee: SIGPLAN conferences that use full double-blind review and whose PCs have at least 50 members need not hold PC submissions to a higher standard. ### Artifact Evaluation for Accepted Papers Authors of conditionally accepted papers will be invited to formally submit supporting materials to the Artifact Evaluation process. Artifact Evaluation is run by a separate committee whose task is to assess how the artifacts support the work described in the papers. Artifact submission is strongly encouraged but voluntary and will not influence the final decision regarding the papers. Papers that go through the Artifact Evaluation process successfully will receive a seal of approval printed on the papers themselves. Authors of accepted papers are encouraged to make these materials publicly available upon publication of the proceedings, by including them as “source materials” in the ACM Digital Library. ### Copyright, Publication, and Presentation As a Gold Open Access journal, PACMPL is committed to making peer-reviewed scientific research free of restrictions on both access and (re-)use. Authors are strongly encouraged to support libre open access by licensing their work with the [Creative Commons Attribution 4.0 International (CC BY) license](https://creativecommons.org/licenses/by/4.0/), which grants readers liberal (re-)use rights. Authors of accepted papers will be required to choose one of the following publication rights: * Author licenses the work with a [Creative Commons license](https://creativecommons.org/), retains copyright, and (implicitly) grants ACM non-exclusive permission to publish (suggested choice). * Author retains copyright of the work and grants ACM a non-exclusive permission to publish license. * Author retains copyright of the work and grants ACM an exclusive permission to publish license. * Author transfers copyright of the work to ACM. These choices follow from ACM Copyright Policy and ACM Author Rights, corresponding to ACM’s “author pays” option. While PACMPL may ask authors who have funding for open-access fees to voluntarily cover the article processing charge, payment is not required for publication. PACMPL and SIGPLAN continue to explore the best models for funding open access, focusing on approaches that are sustainable in the long-term while reducing short-term risk. All papers will be archived by the ACM Digital Library. Authors will have the option of including supplementary material with their paper. The official publication date is the date the proceedings are made available in the ACM Digital Library. This date may be up to two weeks prior to the first day of the conference. The official publication date affects the deadline for any patent filings related to published work. Authors of accepted papers are encouraged to give a short talk (roughly 25 minutes long) at the conference, according to the conference schedule. Authors who wish to present but who cannot attend in person will be provided with some option for remote presentation, as well as some mechanism for remote interaction with conference participants. ### Important update on ACM’s new open access publishing model for 2026 ACM Conferences! Starting January 1, 2026, ACM will fully transition to Open Access. All ACM publications, including those from ACM-sponsored conferences, will be 100% Open Access. Authors will have two primary options for publishing Open Access articles with ACM: the ACM Open institutional model or by paying Article Processing Charges (APCs). With over 1,800 institutions already part of ACM Open, the majority of ACM-sponsored conference papers will not require APCs from authors or conferences (currently, around 70-75%). Authors from institutions not participating in ACM Open will need to pay an APC to publish their papers, unless they qualify for a financial or discretionary waiver. To find out whether an APC applies to your article, please consult the list of participating institutions in ACM Open and review the APC Waivers and Discounts Policy. Keep in mind that waivers are rare and are granted based on specific criteria set by ACM. Understanding that this change could present financial challenges, ACM has approved a temporary subsidy for 2026 to ease the transition and allow more time for institutions to join ACM Open. The subsidy will offer: $250 APC for ACM/SIG members and $350 for non-members. This represents a 65% discount, funded directly by ACM. Authors are encouraged to help advocate for their institutions to join ACM Open during this transition period. This temporary subsidized pricing will apply to all conferences scheduled for 2026. ### Distinguished Paper Awards At most 10% of the accepted papers of POPL 2026 will be designated as Distinguished Papers. This award highlights papers that the Review Committee thinks should be read by a broad audience due to their relevance, originality, significance, and clarity. The selection of the distinguished papers will be made based on the final version of the paper and through an additional review process.

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ICFP/SPLASH 2025: call for volunteers
by ICFP Publicity 03 Jul '25

03 Jul '25

ICFP/SPLASH 2025 are looking for volunteers to help with the organization and smooth running of the conference. In exchange, volunteers receive: - Free conference registration (including banquet) - Free lunches and refreshments during breaks - Volunteer shirt - Admission to all social events *Note: Travel and accommodation are not covered.* *Who can apply? *Anyone can apply. Priority will be given to junior members of the community, such as students in computer science or related fields. *Availability. *Volunteers must be available for at least five (5) full days between October 12–18, 2025, and should be ready to help with various tasks during that period. Some pre-conference coordination and training may be required. We welcome both virtual and in-person volunteers from all time zones. *Apply here: *https://tinyurl.com/splashifcp25-sv-application *More details: * https://conf.researchr.org/track/icfp-splash-2025/icfp-splash-2025-voluntee…

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Postdoctoral Researcher Position at the University of Tartu
by Danel Ahman 01 Jul '25

01 Jul '25

The Laboratory for Software Science at the Institute of Computer Science at the University of Tartu is seeking an aspiring talented and hard-working young scientist to fill a postdoctoral position. The successful candidate will work with Dr. Danel Ahman on topics at the intersection of dependent and refinement types, computational effects (in particular, algebraic effects and effect handlers) and type-and-effect systems, and modal types, with specifics determined based on the common interests of the candidate and the supervisor. Candidates from other related PL areas are also encouraged to apply. Our group currently consists of 4 faculty, 3 (soon 4) PhD students, and soon 1 more postdoc (in addition to this advertisement), with expertise in a wide range of PL topics, ranging from type systems and semantics of programming languages, to abstract interpretation based automated verification tools, to various topics in category theory. Consult our webpage for more information on us: https://sws.cs.ut.ee<https://sws.cs.ut.ee/>. In Estonia, we also have close ties and regularly collaborate with the Algebra Group (https://math.ut.ee/en/content/algebra) at the Institute of Mathematics and Statistics at the University of Tartu, and the Logic and Semantics Group (https://cs.ioc.ee/lsg/) at the Tallinn University of Technology. We also collaborate actively internationally. The position is for up to 18 months, with a start date on 1 Oct 2025 or soon thereafter. The monthly gross salary will start from 2700 EUR depending on the experience of the candidate. The salary includes coverage by the national health insurance system, paid annual leave etc. A salary like this ensures a high standard of living in Estonia. Knowledge of Estonian is not required for this position, and for living in Tartu in general. The working language of our group is English. For more information about life in Tartu and more broadly in Estonia, see https://visittartu.com<https://visittartu.com/> and https://visitestonia.com/en. The job advertisement and application instructions can be found at https://candidate.recrur.com/public/jobad/EN/6b969e7f-8 The application deadline is 01 Aug 2025. Interested candidates should contact Danel Ahman (danel.ahman(a)ut.ee<mailto:danel.ahman@ut.ee>) with any questions.

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Intent to take over maintainership of cql and cql-io
by Kyle Butt 30 Jun '25

30 Jun '25

As per the instructions here: https://wiki.haskell.org/Taking_over_a_package , I am publicly announcing my intent to assume maintainership of the `cql` and `cql-io` packages. There is a discourse thread here as well: https://discourse.haskell.org/t/taking-over-cql-and-cql-io/12397 I have attempted to contact both maintainers via email and on gitlab, without success. I have written necessary improvements to bring the library closer to production quality, and would like to be able to release them to the rest of the haskell ecosystem. Kyle

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Edited page on HaskellWiki cannot be stored
by X Y 24 Jun '25

24 Jun '25

I am trying to add an event to the events template on HaskellWiki; when pressing the "Save changes"-button, I get the message: Database error A database query error has occurred. This may indicate a bug in the software. [e0eb045a214da98ee73cb349] 2025-06-24 14:08:03: Fatal exception of type "Wikimedia\Rdbms\DBQueryError" Can anyone have a look at this? Henk-Jan van Tuyl

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Fwd: gitlab.haskell.org sign-in from new location
by write2mark1＠gmail.com 24 Jun '25

24 Jun '25

This is valid login bitcoin username pls allow me to login ---------- Forwarded message --------- From: GitLab <gitlab(a)gitlab.haskell.org> Date: Tue, Jun 24, 2025 at 5:56 AM Subject: gitlab.haskell.org sign-in from new location To: <write2mark1(a)gmail.com> [image: GitLab] Someone signed in to your gitlab.haskell.org account from a new location Hostname gitlab.haskell.org User mark mm (bitcoin) IP Address 173.8.138.218 Time 2025-06-24 12:56:30 UTC If you recently signed in and recognize the IP address, you may disregard this email. If you did not recently sign in, you should immediately change your password <https://gitlab.haskell.org/help/user/profile/user_passwords.md#change-your-…>. Passwords should be unique and not used for any other sites or services. To further protect your account, consider configuring a two-factor authentication <https://gitlab.haskell.org/help/user/profile/account/two_factor_authenticat…> method. [image: GitLab] You're receiving this email because of your account on gitlab.haskell.org. Manage all notifications <https://gitlab.haskell.org/-/profile/notifications> · Help <https://gitlab.haskell.org/help>

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POPL 2026 Call for Papers
by Ningning Xie 23 Jun '25

23 Jun '25

PACMPL Issue POPL 2026 seeks contributions on all aspects of programming languages and programming systems, both theoretical and practical. Authors of papers published in PACMPL Issue POPL 2026 will be invited to present their work in the POPL conference in January 2026, which is sponsored by ACM SIGPLAN, in cooperation with ACM SIGACT and ACM SIGLOG. POPL 2026 Website: https://popl26.sigplan.org/ Call for Papers: https://conf.researchr.org/track/POPL-2026/POPL-2026-popl-research-papers Submission deadline: July 10 2025 AOE Double-Blind Review FAQ: https://conf.researchr.org/track/POPL-2026/POPL-2026-popl-research-papers#d… ### Organization Conference Location: Rennes, France Conference Dates: January 11-17, 2026 General Chair: Sandrine Blazy, University of Rennes Program Chair: Suresh Jagannathan, Purdue University Program Committee: https://popl26.sigplan.org/committee/POPL-2026-popl-research-papers-program… ### Scope Principles of Programming Languages (POPL) is a forum for the discussion of all aspects of programming languages and programming systems. Both theoretical and experimental papers are welcome, on topics ranging from formal frameworks to experience reports. We seek submissions that make principled, enduring contributions to the theory, design, understanding, implementation, or application of programming languages. ### Evaluation Criteria The Review Committee will evaluate the technical contribution of each submission as well as its accessibility to both experts and the general POPL audience. All papers will be judged on significance, originality, relevance, correctness, and clarity. Each paper must explain its scientific contribution in both general and technical terms, identifying what has been accomplished, explaining why it is significant, and comparing it with previous work. Advice on writing technical papers can be found on the SIGPLAN author information page: https://www.sigplan.org/Resources/Author/. Deadlines and formatting requirements, detailed below, will be strictly enforced. ### Double-Blind Reviewing Process POPL 2026 will use a full double-blind reviewing process (similar to the one used in recent years (POPL 2023 - 2025) but different from the lightweight double-blind process used before then). This means that identities of authors will not be made visible to reviewers until after conditional-acceptance decisions have been made, and then only for the conditionally-accepted papers. The use of full double-blind reviewing has several consequences for authors. * **Submissions**: Authors must omit their names and institutions from their paper submissions. In addition, references to authors’ own prior work should be in the third person (e.g., not “We build on our previous work …” but rather “We build on the work of …”). * **Supplementary material**: Authors are permitted to provide supplementary material (e.g., detailed proofs, proof scripts, system implementations, or experimental data) along with their submission, which reviewers may (but are not required to) examine. This material may take the form of a single file, such as a PDF or a tarball. Authors must fully anonymize any supplementary material. * **Author response**: In responding to reviews, authors should not say anything that reveals their identity, since author identities will not be revealed to reviewers at that stage of the reviewing process. * **Dissemination of work under submission**: Authors are welcome to disseminate their ideas and post draft versions of their paper(s) on their personal website, institutional repository, or arXiv (reviewers will be asked to turn off arXiv notifications during the review period). But authors should not take steps that would almost certainly reveal their identities to members of the Program Committee, e.g., directly contacting PC members or publicizing the work on widely-visible social media or major mailing lists used by the community. The purpose of the above restrictions is to help the Program Committee and external reviewers come to a judgment about the paper without bias, not to make it impossible for them to discover the authors’ identities if they were to try. In particular, nothing should be done in the name of anonymity that weakens the quality of the submission. However, there are occasionally cases where adhering to the above restrictions is truly difficult or impossible for one reason or another. In such cases, the authors should contact the Program Chair to discuss the situation and how to handle it. The FAQ on Double-Blind Reviewing addresses many common scenarios and answers many common questions about this topic. But there remain many grey areas and trade-offs. If you have any doubts about how to interpret the double-blind rules or you encounter a complex case that is not clearly covered by the FAQ, please contact the Program Chair for guidance. ### Evaluation Process POPL 2026 will have five Associate Chairs who will help the PC Chair monitor reviews, solicit external expert reviews for submissions when there is not enough expertise on the committee, and facilitate reviewer discussions. As in previous years, authors will have a multi-day period to respond to reviews, as indicated in the Important Dates table. Responses are optional. A response must be concise, addressing specific points raised in the reviews; in particular, it must not introduce new technical results. Reviewers will write a short reaction to these author responses. The Review Committee (RC) will discuss papers electronically, and will use synchronous virtual meetings to discuss any papers for which there is disagreement among reviewers, in some cases soliciting additional input from other experts in the committee. There is no formal External Review Committee, though experts outside the committee may be consulted for some papers. Reviews will be accompanied by a short summary of the reasons behind the committee’s decision with the goal of clarifying the reasons behind the decision. To conform with ACM requirements for journal publication, all POPL papers will be conditionally accepted; authors will be required to submit a short description of the changes made to the final version of the paper, including how the changes address any requirements imposed by the Review Committee. That the changes are sufficient will be confirmed by the original reviewers prior to acceptance to POPL. Authors of conditionally accepted papers must submit a satisfactory revision to the Review Committee by the requested deadline or risk rejection. For additional information about the reviewing process, see: [Principles of POPL](https://www.sigplan.org/Conferences/POPL/Principles/), a presentation of the underlying organizational and reviewing policies for POPL. For POPL 2026, policies specified in this Call for Papers supersede those in the Principles of POPL document. ### Submission Site Information The submission site is https://popl26.hotcrp.com. Authors can submit multiple times prior to the deadline. Only the last submission will be reviewed. There is no abstract deadline. The submission site requires entering author names and affiliations, relevant topics, and potential conflicts. Addition or removal of authors after the submission deadline will need to be approved by the Program Chair (as this kind of change potentially undermines the goal of eliminating conflicts during paper assignment). The submission deadline is 11:59PM July 10, 2025 anywhere on earth (AOE): https://en.wikipedia.org/wiki/Anywhere_on_Earth ### Conflicts of Interest For each submission, the authors must make sure that they properly declare all potential conflicts of interest for all of the authors of that submission. This includes marking PC conflicts as well as “Other Conflicts (external)”. A conflict caught late in the reviewing process leads to a voided review which may be infeasible to replace. Conflicts should be declared between an adviser and an advisee (e.g., Ph.D., post-doc; forever), between an author and a co-author (papers and proposals; for two years), between people at the same institution (branches of large companies or different locations of research institutes are considered to be the same institution; for two years after leaving an institution), between people with financial conflicts of interest, and between friends or relatives. If a possible reviewer does not meet the above criteria, please do not identify him/her as conflicted. Doing so could be viewed as an attempt to prevent a qualified, but possibly skeptical reviewer from reviewing your paper. If you nevertheless believe that a reviewer who does not meet the above criteria is conflicted, or if you are unsure about a possible conflict, you may identify the person and send a note to the PC Chair. Declaring a spurious conflict with the aim of excluding otherwise qualified reviewers can be grounds for desk rejection. ### Submission Guidelines Prior to the paper submission deadline, authors should upload their full anonymized paper. Here are some key requirements concerning paper submissions: * Each paper should have no more than **25 pages of text, excluding bibliography**, using the PACMPL format (specifically, the `acmart` LaTeX class with `acmsmall` option). It is a single-column page layout with a 10 pt font, 12 pt line spacing, and wider margins than recent POPL page layouts. In this format, the main text block is 5.478 in (13.91 cm) wide and 7.884 in (20.03 cm) tall. Use of a different format (e.g., smaller fonts or a larger text block) is grounds for summary rejection. The PACMPL template for LaTeX can be found at the [SIGPLAN author information page](https://www.sigplan.org/Resources/Author/), and further information about PACMPL submissions can be found on the [PACMPL author guidelines page](https://dl.acm.org/journal/pacmpl/author-guidelines). PACMPL does not support submissions in Microsoft Word. * We strongly encourage use of the `review` and `screen` options in order to make submissions easier to review. * Authors may choose which citation format they wish to use, which can be either author-year (the mandate for final versions in previous years) or numeric. * Submissions should be in PDF and printable on both US Letter and A4 paper. Papers may be resubmitted to the submission site multiple times up until the deadline, but the last version submitted before the deadline will be the version reviewed. * Submitted papers must adhere to the [SIGPLAN Republication Policy](https://www.sigplan.org/Resources/Policies/Republication/) and the [ACM Policy on Plagiarism](https://www.acm.org/publications/policies/plagiarism-overview ). Concurrent paper submissions to other conferences, workshops, journals, or similar forums of publication are not allowed. * Authors are free to submit supplementary material along with their submissions, but it must be fully anonymized. * Authors must list all their conflicts of interest (both PC conflicts and external conflicts) in the HotCRP submission form. * Authors may include additional information in a field of the HotCRP submission form labeled "Confidential Comments for the Program Chair". This information need not be anonymized. It can be used to inform the Program Chair, for example, about sensitive issues concerning a conflict with a PC member or about supplementary material that cannot be anonymized. It is left to the discretion of the Program Chair what to do with this information. * If for some reason an author feels uncomfortable discussing a sensitive issue with the Program Chair (or communicating via the "Confidential Comments" field in HotCRP), they should feel free to get in touch instead with any of the Associate Chairs, with whom they can discuss the issue in confidence. * Submissions from PC members and Associate Chairs (except the Program Chair) are permitted and will not be handled any differently than other submissions. This is in accordance with a recent change in policy approved by the SIGPLAN Executive Committee: SIGPLAN conferences that use full double-blind review and whose PCs have at least 50 members need not hold PC submissions to a higher standard. ### Artifact Evaluation for Accepted Papers Authors of conditionally accepted papers will be invited to formally submit supporting materials to the Artifact Evaluation process. Artifact Evaluation is run by a separate committee whose task is to assess how the artifacts support the work described in the papers. Artifact submission is strongly encouraged but voluntary and will not influence the final decision regarding the papers. Papers that go through the Artifact Evaluation process successfully will receive a seal of approval printed on the papers themselves. Authors of accepted papers are encouraged to make these materials publicly available upon publication of the proceedings, by including them as “source materials” in the ACM Digital Library. ### Copyright, Publication, and Presentation As a Gold Open Access journal, PACMPL is committed to making peer-reviewed scientific research free of restrictions on both access and (re-)use. Authors are strongly encouraged to support libre open access by licensing their work with the [Creative Commons Attribution 4.0 International (CC BY) license](https://creativecommons.org/licenses/by/4.0/), which grants readers liberal (re-)use rights. Authors of accepted papers will be required to choose one of the following publication rights: * Author licenses the work with a [Creative Commons license](https://creativecommons.org/), retains copyright, and (implicitly) grants ACM non-exclusive permission to publish (suggested choice). * Author retains copyright of the work and grants ACM a non-exclusive permission to publish license. * Author retains copyright of the work and grants ACM an exclusive permission to publish license. * Author transfers copyright of the work to ACM. These choices follow from ACM Copyright Policy and ACM Author Rights, corresponding to ACM’s “author pays” option. While PACMPL may ask authors who have funding for open-access fees to voluntarily cover the article processing charge, payment is not required for publication. PACMPL and SIGPLAN continue to explore the best models for funding open access, focusing on approaches that are sustainable in the long-term while reducing short-term risk. All papers will be archived by the ACM Digital Library. Authors will have the option of including supplementary material with their paper. The official publication date is the date the proceedings are made available in the ACM Digital Library. This date may be up to two weeks prior to the first day of the conference. The official publication date affects the deadline for any patent filings related to published work. Authors of accepted papers are encouraged to give a short talk (roughly 25 minutes long) at the conference, according to the conference schedule. Authors who wish to present but who cannot attend in person will be provided with some option for remote presentation, as well as some mechanism for remote interaction with conference participants. ### Important update on ACM’s new open access publishing model for 2026 ACM Conferences! Starting January 1, 2026, ACM will fully transition to Open Access. All ACM publications, including those from ACM-sponsored conferences, will be 100% Open Access. Authors will have two primary options for publishing Open Access articles with ACM: the ACM Open institutional model or by paying Article Processing Charges (APCs). With over 1,800 institutions already part of ACM Open, the majority of ACM-sponsored conference papers will not require APCs from authors or conferences (currently, around 70-75%). Authors from institutions not participating in ACM Open will need to pay an APC to publish their papers, unless they qualify for a financial or discretionary waiver. To find out whether an APC applies to your article, please consult the list of participating institutions in ACM Open and review the APC Waivers and Discounts Policy. Keep in mind that waivers are rare and are granted based on specific criteria set by ACM. Understanding that this change could present financial challenges, ACM has approved a temporary subsidy for 2026 to ease the transition and allow more time for institutions to join ACM Open. The subsidy will offer: $250 APC for ACM/SIG members and $350 for non-members. This represents a 65% discount, funded directly by ACM. Authors are encouraged to help advocate for their institutions to join ACM Open during this transition period. This temporary subsidized pricing will apply to all conferences scheduled for 2026. ### Distinguished Paper Awards At most 10% of the accepted papers of POPL 2026 will be designated as Distinguished Papers. This award highlights papers that the Review Committee thinks should be read by a broad audience due to their relevance, originality, significance, and clarity. The selection of the distinguished papers will be made based on the final version of the paper and through an additional review process.

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POPL 2026 Call for Workshops
by Ningning Xie 23 Jun '25

23 Jun '25

The 53rd ACM SIGPLAN Symposium on Principles of Programming Languages (POPL 2026) will be held in Rennes, France. POPL provides a forum for the discussion of fundamental principles and important innovations in the design, definition, analysis, transformation, implementation and verification of programming languages, programming systems, and programming abstractions. Events focusing on experimental and theoretical topics are welcome. We invite proposals for workshops and other events to be co-located with POPL 2026. All co-located events are sponsored by SIGPLAN (http://acm.org/sigplan/) Workshops should be more informal and focused than POPL itself, and include sessions that enable interaction among the workshop attendees. The preference is for one-day workshops, but other schedules can also be considered. --------------------------------------------------------------------- Submission details Deadline for submission: 25 July 2025 Notification of acceptance: 1 August 2025 A workshop proposal should provide the following information: * Name of the workshop. * A short description (150-200 words) of the workshop. * Call for submissions. * Duration of the workshop. * Whether the workshop will be Conference-approved or SIGPLAN-approved (see below). * Organizers: names, affiliation, contact information, brief (100 words) biography. * Event format: workshop; type of submissions if any; review process; results dissemination. * Expected attendance and target audience. * Potential PC members - please do not contact them before the workshop is approved. * History of the workshop. * Plans for remote participation Please submit your proposals at https://popl26.sigplan.org/track/POPL-2026-workshops-and-co-located-events --------------------------------------------------------------------- SIGPLAN Sponsorship POPL co-located events are sponsored by SIGPLAN (http://sigplan.org/) There are two kinds of co-located events: Conference-approved (no proceedings) and SIGPLAN-approved (proceedings in the ACM Digital Library). See http://www.sigplan.org/Resources/Guidelines/Workshops/ for more information, including a full listing of prescriptions for Conference-approved and SIGPLAN-approved workshops. SIGPLAN-approved workshops must respect the SIGPLAN Diversity Policy. Proposals for SIGPLAN-approved workshops must additionally include the gender, country of affiliation, and professional status of potential PC members. See https://www.sigplan.org/Resources/Policies/Diversity/ for more details. --------------------------------------------------------------------- Selection committee All submissions will be evaluated by a committee comprising the workshops co-chairs, the general chair, and the program chair. --------------------------------------------------------------------- Further information Any questions regarding POPL 2026 co-located event proposals should be addressed to the workshops chairs, Robert Rand (rand(a)uchicago.edu) and Alan Schmitt (alan.schmitt(a)inria.fr)

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IFL 2025, deadline extension
by Mart Lubbers 13 Jun '25

13 Jun '25

===================================================================== IFL 2025 37th Symposium on Implementation and Application of Functional Languages Montevideo, Uruguay October 1-3, 2025 https://www.fing.edu.uy/inco/congresos/ifl2025 ===================================================================== ### Scope The goal of the IFL symposia is to bring together researchers actively engaged in the implementation and application of functional and function-based programming languages. IFL 2025 will be a venue for researchers to present and discuss new ideas and concepts, work in progress, and publication-ripe results related to the implementation and application of functional languages and function-based programming. ### Topics of interest Topics of interest to IFL include, but are not limited to: - language concepts - type systems, type checking, type inferencing - compilation techniques - staged compilation - run-time function specialisation - run-time code generation - partial evaluation - (abstract) interpretation - meta-programming - generic programming - automatic program generation - array processing - concurrent/parallel programming - concurrent/parallel program execution - embedded systems - web applications - (embedded) domain specific languages - security - novel memory management techniques - run-time profiling performance measurements - debugging and tracing - virtual/abstract machine architectures - validation, verification of functional programs - tools and programming techniques ### Peer-review process Differently from previous editions of IFL, IFL 2025 solicits two kinds of submissions: * Regular papers (12 pages excluding references) * Draft papers for presentations ('weak' limit between 8 and 15 pages) Regular papers will undergo a rigorous review by the program committee, and will be evaluated according to their correctness, novelty, originality, relevance, significance, and clarity. Regular papers can be: accepted for publication in the formal proceedings, accepted for presentation at the symposium or rejected. Draft papers will be screened to make sure that they are within the scope of IFL, and will be accepted for presentation or rejected accordingly. We require that at least one of the authors present the work at IFL 2025. Authors of accepted presentations will be given the opportunity to incorporate the feedback from discussions at the symposium and will be invited to submit a revised full article for the formal post-proceedings after the symposium. The program committee will evaluate these submissions according to their correctness, novelty, originality, relevance, significance, and clarity, and will thereby determine whether the paper is accepted or rejected. ### Important dates Submission of regular papers: June 23, 2025 (extended) Regular papers notification: August 4, 2025 Submission of draft papers: August 4, 2025 Draft papers notification: August 11, 2025 Deadline for early registration: September 5, 2025 Submission of pre-proceedings version: September 8, 2025 IFL Symposium: October 1-3, 2025 Submission of papers for post-proceedings: December 15, 2025 Notification of acceptance: February 28, 2026 Camera-ready version: March 30, 2026 Deadlines are end of day Anywhere on Earth (UTC-12) (https://www.timeanddate.com/time/zones/aoe) ### Submission details All contributions must be written in English. Papers must use the ACM two columns conference format, which can be found at: http://www.acm.org/publications/proceedings-template Submit your paper here: https://easychair.org/conferences/?conf=ifl2025 Important note to authors about the new ACM open access publishing model ACM has introduced a new open access publishing model for the International Conference Proceedings Series (ICPS). Authors based at institutions that are not yet part of the ACM Open program and do not qualify for a waiver will be required to pay an article processing charge (APC) to publish their ICPS article in the ACM Digital Library. To determine whether or not an APC will be applicable to your article, please follow the detailed guidance here: https://www.acm.org/publications/icps/author-guidance. Further information may be found on the ACM website, as follows: - Full details of the new ICPS publishing model: https://www.acm.org/publications/icps/faq - Full details of the ACM Open program: https://www.acm.org/publications/openaccess - Please direct all questions about the new model to icps-info(a)acm.org. ### Peter Landin Prize The Peter Landin Prize is awarded to the best paper presented at the symposium every year. The honoured article is selected by the program committee based on the submissions received for the formal review process. The prize carries a cash award equivalent to 150 Euros. ### Organisation PC Chairs: Alberto Pardo, Universidad de la República, Montevideo, Uruguay Marcos Viera, Universidad de la República, Montevideo, Uruguay Publicity Chair: Mart Lubbers, Radboud University, The Netherlands Local Chairs: Alberto Pardo, Universidad de la República, Montevideo, Uruguay Marcos Viera, Universidad de la República, Montevideo, Uruguay ### Program committee: Matteo Cimini, University of Massachusetts Lowell Facundo Domínguez, Tweag João Paulo Fernandes, Universidade do Porto Jeremy Gibbons, Oxford University Jurriaan Hage, Heriot Watt University Jason Hemann, Seton Hall University Maja Hanne Kirkeby, Roskilde University Mart Lubbers, Radboud University Bruno C. D. S. Oliveira, The University of Hong Kong Rinus Plasmeijer, Radboud University Andre Rauber Du Bois, Universidade Federal de Pelotas Rodrigo Ribeiro, Universidade Federal de Ouro Preto Alejandro Russo, Chalmers University of Technology João Saraiva, University of Minho Wenhao Tang, University of Edinburgh Zhixuan Yang, Imperial College London Brent Yorgey, Hendrix College Beta Ziliani, Manas.Tech Viktória Zsók, Eötvös Loránd University ### Venue IFL 2025 will be held physically in Montevideo, Uruguay. See the website for more information. https://www.fing.edu.uy/inco/congresos/ifl2025 ### Acknowledgments This call-for-papers is an adaptation and evolution of content from previous instances of IFL. We are grateful to prior organisers for their work, which is reused here.

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TyDe 2025 - deadline extension, remote presentations possible
by Andras Kovacs 10 Jun '25

10 Jun '25

========================================================================= The Tenth International Workshop on TYPE-DRIVEN DEVELOPMENT Call for papers and extended abstracts Singapore, 12 October 2025 https://icfp25.sigplan.org/home/tyde-2025 ========================================================================= The Workshop on Type-Driven Development (TyDe) aims to show how static type information may be used effectively in the development of computer programs. Co-located with ICFP and SPLASH, this workshop brings together leading researchers and practitioners who are using or exploring types as a means of program development. We welcome all contributions, both theoretical and practical, on a range of topics including: * dependently typed programming; * generic programming; * design and implementation of programming languages, exploiting types in novel ways; * exploiting typed data, data dependent data, or type providers; * static and dynamic analyses of typed programs; * tools, IDEs, or testing tools exploiting type information; * pearls, being elegant, instructive examples of types used in the derivation, calculation, or construction of programs. ### Important dates ### * Sun 22 Jun 2025 (AoE): Submission deadline for papers and extended abstracts * Wed 23 Jul 2025: Notification of acceptance * Wed 6 Aug 2025: Submission of camera-ready papers to ACM * Sun 12 Oct 2025: Workshop ### Proceedings and Copyright ### We will have formal proceedings for full-length papers, published by the ACM. Accepted papers will be included in the ACM Digital Library. Authors must grant ACM publication rights upon acceptance, but may retain copyright if they wish. Authors are encouraged to publish auxiliary material with their paper (source code, test data, and so forth). The proceedings will be freely available for download from the ACM Digital Library from one week before the start of the conference until two weeks after the conference. The official publication date is the date the papers are made available in the ACM Digital Library. This date may be up to two weeks prior to the first day of the conference. The official publication date affects the deadline for any patent filings related to published work. ### Submission Details ### Submissions should fall into one of two categories: * regular research papers (12 pages); * extended abstracts (3 pages). The bibliography will not be counted against the page limits for either category. Regular research papers are expected to present novel and interesting research results, and will be included in the formal proceedings. Extended abstracts should report work in progress that the authors would like to present at the workshop. Extended abstracts will be distributed to workshop attendees but will not be published in the formal proceedings. We welcome submissions from PC members (with the exception of the two co-chairs), but these submissions will be held to a higher standard. Submission is handled through HotCRP: > https://tyde25.hotcrp.com All submissions should be in portable document format (PDF) and formatted using the ACM SIGPLAN style guidelines: > https://www.sigplan.org/Resources/Author/ Note that submissions should use the new ‘acmart’ format and the two-column ‘sigplan’ subformat (not to be confused with the one-column ‘acmsmall’ subformat). Extended abstracts must be submitted with the label ‘Extended Abstract’ clearly in the title. ### Presentations ### We expect that each accepted submission is presented at the workshop. Presentations are around 20 minutes plus questions. Remote presentation is possible. ### Participant Support ### Student attendees with accepted papers can apply for a SIGPLAN PAC grant to help cover participation-related expenses. PAC also offers other support, such as for child-care expenses during the meeting or for accommodations for members with physical disabilities. For details on the PAC program, see its web page: > https://www.sigplan.org/PAC/ ### Workshop Organization ### Organizing Committee: - András Kovács (University of Gothenburg and Chalmers University of Technology) - Yuting Wang (Shanghai Jiao Tong University, China) Program Committee: - Nathan Corbyn (University of Oxford, United Kingdom) - Stephen Dolan (Jane Street, United Kingdom) - Paul Downen (University of Massachusetts at Lowell, United States) - Brandon Hewer (University of Nottingham, United Kingdom) - Hongwei Xi (Boston University, United States) - Wen Kokke (University of Edinburgh, United Kingdom) - Yao Li (Portland State University, United States) - Hidehiko Masuhara (Institute of Science Tokyo, Japan) - Stefan Monnier (Université de Montréal, Canada) - Steven Ramsay (University of Bristol, United Kingdom) - Di Wang (Peking University, China) - Zhixuan Yang (Imperial College London, United Kingdom)

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