November 2014 - ghc-tickets

[GHC] #8544: Auto-Reference ticket-related branches in tickets
by GHC 18 Nov '14

18 Nov '14

#8544: Auto-Reference ticket-related branches in tickets ------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Trac & Git | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- This has two possible implementations (and both are useful and can complement each other): * Add a new field to the description „Related branch“. If for ticket #1234 there is a branch matching `T1234` (usually something like `wip/T1234`), link it from there. * When such a branch is created or deleted, post a message to the ticket. This way subscribers know about a possible ongoing implementation, and can review it. These should link somewhere I believe `https://ghc.haskell.org/trac/ghc/log/ghc?rev=<branchname>` is the most useful link. If the link is part of the „branch created“ message, it will become dangling after the branch is closed (presumably because the feature was merged; then the actually commits, if they reference the bug, will be auto-linked). I don’t think this is a problem. But if that is a problem, only put the link in the “Related branches” field, and clear it when the branch is deleted. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8544> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9811: constant folding with infinities is wrong
by GHC 18 Nov '14

18 Nov '14

#9811: constant folding with infinities is wrong -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: #9810 | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- {{{ main = let big = 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 :: Double in print (big * big - big * big) }}} prints NaN when compiled without optimizations but 0.0 when compiled with optimizations. Or, `print (big * big / 2)` prints Infinity when compiled without optimizations but 8.98846567431158e307 when compiled with optimizations (this number is `fromRational (toRational (1/0) / 2)`). The cause is the conversions that go on between Rational and Double in PrelRules (in the functions doubleOp2, mkDoubleVal, convFloating). Ideally, we would have an accurate model of floating-point arithmetic on the target machine, but for now it would be an improvement to just not constant fold when the result is not a finite floating-point number. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9811> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8527: container's Typeable.h is being shadowed by base's Typeable.h during preprocessing
by GHC 17 Nov '14

17 Nov '14

#8527: container's Typeable.h is being shadowed by base's Typeable.h during preprocessing ------------------------------------+------------------------------------- Reporter: parcs | Owner: parcs Type: bug | Status: new Priority: normal | Milestone: Component: Package system | Version: 7.7 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- Here's a reduced test case: == cpp.hs == {{{ #!haskell {-# LANGUAGE CPP #-} #include "Typeable.h" main = return () }}} == command line == {{{ $ ghc-stage2 -c -package base cpp.hs In file included from cpp.hs:4:0: /home/patrick/code/ghc/libraries/base/include/Typeable.h:17:2: warning: #warning <Typeable.h> is obsolete and will be removed in GHC 7.10 [-Wcpp] #warning <Typeable.h> is obsolete and will be removed in GHC 7.10 ^ compilation IS NOT required $ ghc-stage2 -c -package base -package containers cpp.hs compilation IS NOT required $ ghc-stage2 -c -package containers -package base cpp.hs }}} Notice that if I pass `-package containers` to ghc, the cpp warning from Typeable.h (from the base library) doesn't appear. This is because containers also has a Typeable.h in its include path, and in the invocation of the preprocessor, containers' include path precedes base's no matter how I order the `-package` directives. This behavior is intuitive and limiting. To fix this, I think that the ordering of -I directives passed to the preprocessor should be consistent with the ordering of -package directives passed to ghc. For example, in the above test case, a warning should be shown in the 1st and 2nd invocations of ghc but not the 3rd, because in the 3rd invocation containers precedes base. Does this sound okay? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8527> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8528: Preprocessor issues building GHC HEAD on Mavericks
by GHC 17 Nov '14

17 Nov '14

#8528: Preprocessor issues building GHC HEAD on Mavericks ----------------------------------+---------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Keywords: | Operating System: MacOS X Architecture: x86_64 (amd64) | Type of failure: Building GHC failed Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+---------------------------------------- I can't build GHC HEAD on Mavericks with Xcode 5 and GCC 4.2. My system: * Mavericks, Xcode 5. * Building with GHC 7.6.3 x64 installed from . * Apple GCC 4.2 installed via homebrew. In /Library/Frameworks/GHC.framework/Versions/7.6.3-x86_64/usr/lib/ghc-7.6.3/settings, I've changed the compiled to this: ("C compiler command", "/Users/nkpart/bin/gcc"), ~/bin/gcc is #!/bin/sh echo $* >> ~/bin/gcc_log gcc-4.2 $@ I have run: $ git clone .. $ perl boot $ ./configure $ make The error I get is: "/usr/bin/ghc" -M -static -H64m -O0 -fasm -package-db libraries/bootstrapping.conf -i -iutils/genprimopcode/. -iutils/genprimopcode/dist/build -iutils/genprimopcode/dist/build/autogen -Iutils/genprimopcode/dist/build -Iutils/genprimopcode/dist/build/autogen -package array -no-user-package-db -rtsopts -odir utils/genprimopcode/dist/build -hidir utils/genprimopcode/dist/build -stubdir utils/genprimopcode/dist/build -dep-makefile utils/genprimopcode/dist/build/.depend.haskell.tmp -dep-suffix "" -include-pkg-deps utils/genprimopcode/dist/build/Lexer.hs utils/genprimopcode/./Main.hs utils/genprimopcode/./ParserM.hs utils/genprimopcode/dist/build/Parser.hs utils/genprimopcode/./Syntax.hs line-map.c: file "templates/GenericTemplate.hs" left but not entered utils/genprimopcode/dist/build/Lexer.hs:143:0: error: #else without #if utils/genprimopcode/dist/build/Lexer.hs:144:0: warning: "GTE" redefined utils/genprimopcode/dist/build/Lexer.hs:141:0: warning: this is the location of the previous definition utils/genprimopcode/dist/build/Lexer.hs:145:0: warning: "EQ" redefined utils/genprimopcode/dist/build/Lexer.hs:142:0: warning: this is the location of the previous definition utils/genprimopcode/dist/build/Lexer.hs:146:0: error: #endif without #if utils/genprimopcode/dist/build/Lexer.hs:197:0: error: #else without #if utils/genprimopcode/dist/build/Lexer.hs:200:0: error: #endif without #if make[1]: *** [utils/genprimopcode/dist/build/.depend.haskell] Error 1 make: *** [all] Error 2 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8528> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7678: GHC should compile cleanly with clang
by GHC 17 Nov '14

17 Nov '14

#7678: GHC should compile cleanly with clang -------------------------------------+------------------------------------- Reporter: | Owner: thoughtpolice thoughtpolice | Status: closed Type: bug | Milestone: 7.8.1 Priority: high | Version: 7.7 Component: Compiler | Keywords: clang Resolution: fixed | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: Building | Related Tickets: GHC failed | Test Case: | Blocking: 7602 | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by thomie): Replying to [comment:15 hvr]: > fyi, I'm afraid the situation has changed; see [http://www.haskell.org/pipermail/ghc-devs/2014-April/004489.html this email] for details. The followup [https://www.haskell.org/pipermail/ghc- devs/2014-April/004631.html email] let's me believe this issue is really fixed now. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7678#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8545: Reorganize Git repositories
by GHC 17 Nov '14

17 Nov '14

#8545: Reorganize Git repositories ------------------------------------+------------------------------------- Reporter: hvr | Owner: hvr Type: task | Status: new Priority: normal | Milestone: 7.10.1 Component: Trac & Git | Version: Keywords: git | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #8251 | ------------------------------------+------------------------------------- This is to track the progress for the GitRepoReorganization which is to be tackled post-7.8 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8545> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8559: Compiling dph-lifted fails with "NoSpecConstr" not in scope
by GHC 17 Nov '14

17 Nov '14

#8559: Compiling dph-lifted fails with "NoSpecConstr" not in scope -------------------------------------+------------------------------------- Reporter: trommler | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Data Parallel | Version: 7.7 Haskell | Operating System: Linux Keywords: | Type of failure: Building GHC Architecture: powerpc64 | failed Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- Building ghc-7.7.20131120 fails with this on powerpc64 Linux: {{{ "inplace/bin/ghc-stage2" -hisuf hi -osuf o -hcsuf hc -static -H32m -O -package-name dph-lifted-copy-0.8.0.1 -hide-all-packages -i -ilibraries/dph/dph-lifted-copy/. -ilibraries/dph/dph-lifted-copy/dist- install/build -ilibraries/dph/dph-lifted-copy/dist-install/build/autogen -Ilibraries/dph/dph-lifted-copy/dist-install/build -Ilibraries/dph/dph- lifted-copy/dist-install/build/autogen -Ilibraries/dph/dph-lifted-copy/. -optP-include -optPlibraries/dph/dph-lifted-copy/dist- install/build/autogen/cabal_macros.h -package array-0.5.0.0 -package base-4.7.0.0 -package dph-base-0.8.0.1 -package dph-prim-par-0.8.0.1 -package ghc-7.7.20131115 -package random-1.0.1.1 -package template- haskell-2.9.0.0 -package vector-0.10.9.1 -Odph -funbox-strict-fields -fcpr-off -fno-warn-orphans -fno-warn-missing-signatures -XHaskell98 -XTypeFamilies -XGADTs -XRankNTypes -XBangPatterns -XMagicHash -XUnboxedTuples -XTypeOperators -O2 -no-user-package-db -rtsopts -odir libraries/dph/dph-lifted-copy/dist-install/build -hidir libraries/dph/dph-lifted-copy/dist-install/build -stubdir libraries/dph /dph-lifted-copy/dist-install/build -c libraries/dph/dph-lifted- copy/./Data/Array/Parallel/PArray/PData.hs -o libraries/dph/dph-lifted- copy/dist-install/build/Data/Array/Parallel/PArray/PData.o [23775s] [23775s] libraries/dph/dph-lifted- copy/Data/Array/Parallel/PArray/PData.hs:49:20: [23775s] Not in scope: data constructor `NoSpecConstr' [23775s] make[1]: *** [libraries/dph/dph-lifted-copy/dist- install/build/Data/Array/Parallel/PArray/PData.o] Error 1 [23775s] make: *** [all] Error 2 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8559> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9801: Make listArray fuse
by GHC 17 Nov '14

17 Nov '14

#9801: Make listArray fuse -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: task | Status: new Priority: normal | Milestone: 7.10.1 Component: Core Libraries | 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: Phab:D474 -------------------------------------+------------------------------------- `GHC.Arr.listArray` does not currently fuse with a good list producer. Let's make that happen. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9801> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7653: incorrect handling of StackOverflow exception in the event manager
by GHC 17 Nov '14

17 Nov '14

#7653: incorrect handling of StackOverflow exception in the event manager -----------------------------------+------------------------------------ Reporter: nus | Owner: tibbe Type: bug | Status: closed Priority: normal | Milestone: 7.8.1 Component: libraries/base | Version: 7.7 Resolution: fixed | Keywords: Operating System: Linux | Architecture: Unknown/Multiple Type of failure: Runtime crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -----------------------------------+------------------------------------ Comment (by Austin Seipp <austin@…>): In [changeset:"a520761d065a84838896e8dd09d8aaec77480d60/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="a520761d065a84838896e8dd09d8aaec77480d60" Remove outdated TODO in TimeManager Summary: It describes a work around Trac #3838, but it is already fixed and the workaround removed, Trac #7653 Test Plan: not needed Reviewers: hvr, Mikolaj, austin Reviewed By: austin Subscribers: thomie, carter Differential Revision: https://phabricator.haskell.org/D478 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7653#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4900: DEPENDS pragma
by GHC 17 Nov '14

17 Nov '14

#4900: DEPENDS pragma -------------------------------------+------------------------------------- Reporter: cdsmith | Owner: Type: feature | Status: new request | Milestone: 7.10.1 Priority: normal | Version: Component: Compiler | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: TH_Depends | Blocking: | Differential Revisions: Phab:D481 | -------------------------------------+------------------------------------- Comment (by Austin Seipp <austin@…>): In [changeset:"0515055abfcf5957d7a957607b4785320627fd65/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="0515055abfcf5957d7a957607b4785320627fd65" document addDependentFile uses contents, not mtime Reviewers: austin Reviewed By: austin Subscribers: thomie, carter Differential Revision: https://phabricator.haskell.org/D481 GHC Trac Issues: #4900 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4900#comment:74> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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