September 2016 - ghc-tickets

Re: [GHC] #4239: -ddump-minimal-imports vs. type operators
by GHC 01 Sep '16

01 Sep '16

#4239: -ddump-minimal-imports vs. type operators -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 7.10.3 Resolution: fixed | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: T4239 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2480 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: patch => closed * resolution: => fixed * milestone: => 8.2.1 Comment: Thanks Malo! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4239#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4239: -ddump-minimal-imports vs. type operators
by GHC 01 Sep '16

01 Sep '16

#4239: -ddump-minimal-imports vs. type operators -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: T4239 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2480 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"f233f00b1915ac6c0a200b8017a9f07deefd401e/ghc" f233f00/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="f233f00b1915ac6c0a200b8017a9f07deefd401e" Fix startsVarSym and refactor operator predicates (fixes #4239) startsVarSym used isSymbol which does not recognize valid operators beginning with OtherPunctuation generalCategory (e. g. (·)). Move it to ghc-boot-th for reducing duplication. This patch fixes template-haskell pretty printer, which is used by -ddump-minimal-imports. Reviewers: austin, bgamari Reviewed By: bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2480 GHC Trac Issues: #4239 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4239#comment:11> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4239: -ddump-minimal-imports vs. type operators
by GHC 01 Sep '16

01 Sep '16

#4239: -ddump-minimal-imports vs. type operators -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: T4239 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2480 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"b946cf3f5d6fd273a79b008472e8cb0ad1432be1/ghc" b946cf3/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="b946cf3f5d6fd273a79b008472e8cb0ad1432be1" Revert "Fix startsVarSym and refactor operator predicates (fixes #4239)" This reverts commit 8d35e18d885e60f998a9dddb6db19762fe4c6d92. arc butchered the authorship on this. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4239#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4239: -ddump-minimal-imports vs. type operators
by GHC 01 Sep '16

01 Sep '16

#4239: -ddump-minimal-imports vs. type operators -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: T4239 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2480 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"8d35e18d885e60f998a9dddb6db19762fe4c6d92/ghc" 8d35e18/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="8d35e18d885e60f998a9dddb6db19762fe4c6d92" Fix startsVarSym and refactor operator predicates (fixes #4239) startsVarSym used isSymbol which does not recognize valid operators beginning with OtherPunctuation generalCategory (e. g. (·)). Move it to ghc-boot-th for reducing duplication. This patch fixes template-haskell pretty printer, which is used by -ddump-minimal-imports. Reviewers: austin, bgamari Reviewed By: bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2480 GHC Trac Issues: #4239 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4239#comment:9> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7450: Regression in optimisation time of functions with many patterns (6.12 to 7.4)?
by GHC 01 Sep '16

01 Sep '16

#7450: Regression in optimisation time of functions with many patterns (6.12 to 7.4)? -------------------------------------+------------------------------------- Reporter: iustin | Owner: bgamari Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1012 Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * cc: RyanGlScott (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7450#comment:33> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1544: Derived Read instances for recursive datatypes with infix constructors are too inefficient
by GHC 01 Sep '16

01 Sep '16

#1544: Derived Read instances for recursive datatypes with infix constructors are too inefficient -------------------------------------+------------------------------------- Reporter: jcpetruzza@… | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 6.6.1 Resolution: | Keywords: deriving-perf Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * cc: RyanGlScott (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1544#comment:36> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12170: Add flag to control whether out of scope variables should be deferred with -fdefer-typed-holes
by GHC 01 Sep '16

01 Sep '16

#12170: Add flag to control whether out of scope variables should be deferred with -fdefer-typed-holes -------------------------------------+------------------------------------- Reporter: mpickering | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: newcomer | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: #10569 Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- As a result of #10569, out of scope variables are turned into special type holes so that type information of the variable can be attached to the error message. However, this causes problems when used with `-fdefer-typed-holes` as scope errors have been turned into type errors and are now deferred when using this flag. Richard sums up the situation, "Even if someone is deferring type errors, I imagine most people don't want to defer scope errors". It would be good to add a flag which controls whether out of scope variables are also deferrable when used with existing deferral flags. Goal: Add a flag ` -fdefer-out-of-scope-variables` which controls whether out of scope variables are deferred when using `-fdefer-typed-holes`. It should be turned off by default. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12170> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12491: ghc-iserv pattern match failure
by GHC 01 Sep '16

01 Sep '16

#12491: ghc-iserv pattern match failure -------------------------------------+------------------------------------- Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- While trying to debug the issue in https://ghc.haskell.org/trac/ghc/ticket/11981#comment:10 I found that that `ghc-iserv` executable run without any arguments fails with a pattern match failure: {{{ $ inplace/lib/bin/ghc-iserv ghc-iserv: user error (Pattern match failure in do expression at iserv/src/Main.hs:28:3-18) }}} Would be far nicer if it printed out an error message saying what arguments it expected, or how to run it to avoid this pattern match failure. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12491> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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