August 2015 - ghc-tickets

Re: [GHC] #367: Infinite loops can hang Concurrent Haskell
by GHC 05 Aug '15

05 Aug '15

#367: Infinite loops can hang Concurrent Haskell -------------------------------------+------------------------------------- Reporter: simonpj | Owner: ezyang Type: bug | Status: new Priority: lowest | Milestone: ⊥ Component: Compiler | Version: 6.4.1 Resolution: None | Keywords: scheduler | allocation Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Incorrect result | Test Case: at runtime | concurrent/should_run/T367, | concurrent/should_run/T367_letnoescape Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"4c55f14d0ab0f2b099c475a9810012f645bb059e/ghc" 4c55f14d/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="4c55f14d0ab0f2b099c475a9810012f645bb059e" users_guide: Add note about #367 to Bugs section This is a long-standing bug and should be mentioned in the users guide, as noted in #10639. Test Plan: Carefully check language. Reviewers: simonpj, rwbarton, austin Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D1127 GHC Trac Issues: #10639, #367 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/367#comment:42> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1062: Bad output from Text.PrettyPrint.HughesPJ
by GHC 05 Aug '15

05 Aug '15

#1062: Bad output from Text.PrettyPrint.HughesPJ -------------------------------------+------------------------------------- Reporter: igloo | Owner: ekmett Type: bug | Status: closed Priority: normal | Milestone: ⊥ Component: Core Libraries | Version: 6.6 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: pp1 Blocked By: | Blocking: Related Tickets: #669 | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: new => closed * resolution: => duplicate * related: => #669 Comment: Replying to [comment:3 thorkilnaur]: > This is actually a duplicate of #669. Reclosing. thorkilnaur and benedikt were the last ones to truly understand the pretty library, and I trust their judgement on this. Replying to [comment:6 igloo]: > Reopening, as this ticket is for the bad output of the pp1 test. The pp1 test is nowhere to be found, and the pretty bug tracker is at https://github.com/haskell/pretty/issues nowadays. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1062#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9430: implement more arithmetic operations natively in the LLVM backend
by GHC 05 Aug '15

05 Aug '15

#9430: implement more arithmetic operations natively in the LLVM backend -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (LLVM) | Version: 7.9 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Moderate (less | Type of failure: Runtime than a day) | performance bug Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- There are a number of arithmetic operations that have native implementations on x86 but use the generic fallback on LLVM. Implementing these with LLVM intrinsics could improve small Integer performance on ARM substantially! {{{ MO_Add2 @llvm.uadd.with.overflow.* MO_AddIntC @llvm.sadd.with.overflow.* MO_SubIntC @llvm.ssub.with.overflow.* MO_U_Mul2 mul i64/i128? MO_U_QuotRem2 udiv i64/i128? }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9430> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1290: ghc runs preprocessor too much
by GHC 05 Aug '15

05 Aug '15

#1290: ghc runs preprocessor too much -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Driver | Version: 6.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by ezyang): * milestone: ⊥ => 7.12.1 Comment: What if this information was cached in the interface file? Essentially, interface files should contain enough information for us to construct a `ModSummary`, and they are as recent as the source file we can just use this directly. (And we're going to read the interface file anyway shortly thereafter do check for recompilation avoidance.) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1290#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7666: excessive space and time usage for rendering (somewhat) deeply nested Docs
by GHC 05 Aug '15

05 Aug '15

#7666: excessive space and time usage for rendering (somewhat) deeply nested Docs -------------------------------------+------------------------------------- Reporter: j.waldmann | Owner: dterei Type: bug | Status: closed Priority: normal | Milestone: 7.12.1 Component: Core Libraries | Version: 7.6.2 Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by thomie): To be fair: `tpdb` probably had less dependencies when you submitted this bug. It also depends on `wl-pprint-text` now, perhaps because pretty is too slow/uses too much memory... Anyway, please open a bug on the pretty bug tracker, it will hopefully get more attention there. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7666#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7666: excessive space and time usage for rendering (somewhat) deeply nested Docs
by GHC 05 Aug '15

05 Aug '15

#7666: excessive space and time usage for rendering (somewhat) deeply nested Docs -------------------------------------+------------------------------------- Reporter: j.waldmann | Owner: dterei Type: bug | Status: closed Priority: normal | Milestone: 7.12.1 Component: Core Libraries | Version: 7.6.2 Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: new => closed * resolution: => invalid Comment: Closing as invalid, since the pretty bug tracker is here: https://github.com/haskell/pretty/issues. I did try to build your testcase. But besides haxml, it also requires a package called tpdb, which itself has so many dependencies I gave up. If you do reopen on the pretty bug tracker, pleas make the test smaller, include build instructions, and expected output. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7666#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9233: Compiler performance regression
by GHC 05 Aug '15

05 Aug '15

#9233: Compiler performance regression ------------------------------------+--------------------------------- Reporter: augustss | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Windows Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+--------------------------------- Compiling all of our Haskell modules (about 1300 modules, 310 kLOC) takes about 30% longer with ghc 7.8 than it did with ghc 7.2. (Using 32-bit Windows.) Sorry, I can't really provide any simple test case. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9233> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3699: Wildcards in type functions
by GHC 04 Aug '15

04 Aug '15

#3699: Wildcards in type functions -------------------------------------+------------------------------------- Reporter: | Owner: msosn MartijnVanSteenbergen | Type: feature request | Status: closed Priority: low | Milestone: 7.12.1 Component: Compiler (Type | Version: 6.10.4 checker) | Resolution: fixed | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: Phab:D1092 -------------------------------------+------------------------------------- Comment (by MartijnVanSteenbergen): You are amazing! Thanks for building this. :-) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3699#comment:26> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7206: Implement cheap build
by GHC 04 Aug '15

04 Aug '15

#7206: Implement cheap build -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: ⊥ Component: Compiler | Version: 7.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by bgamari): This is with `cheapBuild` being used for enumerations. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7206#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7206: Implement cheap build
by GHC 04 Aug '15

04 Aug '15

#7206: Implement cheap build -------------------------------------+------------------------------------- Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: ⊥ Component: Compiler | Version: 7.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): Is this with or without using `cheapBuild` for enumerations? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7206#comment:15> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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