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[GHC] #10759: don't throw BlockedIndefinitelyOn... in main thread
by GHC 21 Aug '15

21 Aug '15

#10759: don't throw BlockedIndefinitelyOn... in main thread -------------------------------------+------------------------------------- Reporter: yokto | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- In the main thread UserInterrupt can be thrown to unblock a thread. So the following program should wait for such an interrupt instead of throwing a BlockedIndefinitelyOnMVar exception {{{ main = do var <- newEmptyMVar takeMVar var `catch` (const $ putStrLn "UserInterrupt caught" :: AsyncException -> IO ()) }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10759> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10784: ghci crashed when ``-with-rtsopts=-A64m'' is specified
by GHC 21 Aug '15

21 Aug '15

#10784: ghci crashed when ``-with-rtsopts=-A64m'' is specified -------------------------------------------+------------------------------- Reporter: wangbj | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Keywords: | Operating System: Linux Architecture: Unknown/Multiple | Type of failure: GHCi crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------------+------------------------------- $ cat /tmp/t1.hs {-# OPTIONS -O2 -with-rtsopts=-A64m #-} main = putStrLn "hello, world!" wangbj@nuc ~/hs $ runghc /tmp/t1.hs ghc: panic! (the 'impossible' happened) (GHC version 7.10.2 for x86_64-unknown-linux): floatExpr tick break<0>() Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10784> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8484: Compile-time panic
by GHC 20 Aug '15

20 Aug '15

#8484: Compile-time panic ----------------------------------+--------------------------------------- Reporter: Taymon | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Linux Architecture: x86_64 (amd64) | Type of failure: Compile-time crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+--------------------------------------- I attempted to build a program (using make) and got the following output: {{{ ghc -odir binaries -hidir binaries --make Main.hs -optl-w ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for x86_64-unknown-linux): While parsing "/home/taymonbeal/.ghc/x86_64-linux-7.6.3/package.conf.d/package.cache": too few bytes. Failed reading at byte position 8 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug make: *** [build] Error 1 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8484> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10780: Weak reference is still alive if key is alive, but weak reference itself not reachable
by GHC 20 Aug '15

20 Aug '15

#10780: Weak reference is still alive if key is alive, but weak reference itself not reachable -------------------------------------+------------------------------------- Reporter: atze | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: Component: Runtime | Version: 7.10.2 System | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Runtime Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- We've been running into some unexpected behavior with weak references. The use case it hackage package HMap, which is a (heterogenous, but that is besides the point) map from keys to values. Since there is no way to enumerate all elements in the map, there is no way to obtain a value for a key if the key is dead. As an optimization, I therefore used weak references to the values in the map, such that if the key dies, then the value is also dead. I was under the impression that a weak reference is alive if: (1): The key is still alive AND (2): The weak reference itself is alive (i.e. reachable from root set) However, the actual behavior is that a weak reference is alive if (1), (2) does not matter. Hence, the weak references here actually create a space leak, because an alive key will keep all values in all maps that it was ever used in alive. I think it would be desirable, to change the behavior to (1) AND (2), instead of just (1). This would prevent space leaks in this use case instead of creating them. Or would this cause problems in other use cases? See also: https://github.com/atzeus/HMap/issues/5#issuecomment-132538324 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10780> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #4243: Make a proper options parser for the RTS
by GHC 20 Aug '15

20 Aug '15

#4243: Make a proper options parser for the RTS -------------------------------------+------------------------------------- Reporter: igloo | Owner: Type: task | Status: new Priority: normal | Milestone: 7.12.1 Component: Runtime System | Version: 6.13 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: 7535 Related Tickets: #9839 | Differential Revisions: -------------------------------------+------------------------------------- Changes (by carlostome): * owner: carlostome => -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4243#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7285: mkWeakMVar is non-compositional
by GHC 20 Aug '15

20 Aug '15

#7285: mkWeakMVar is non-compositional -------------------------------------+------------------------------------- Reporter: edsko | Owner: ekmett Type: feature request | Status: new Priority: normal | Milestone: 7.12.1 Component: Core Libraries | Version: 7.6.1 Resolution: | 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): The libraries proposal mentioned in comment:7: https://mail.haskell.org/pipermail/libraries/2014-November/024143.html -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7285#comment:9> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1851: "make install-strip" should work
by GHC 19 Aug '15

19 Aug '15

#1851: "make install-strip" should work -------------------------------------+------------------------------------- Reporter: igloo | Owner: thomie Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Build System | Version: 7.10.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Building GHC | Unknown/Multiple failed | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * owner: => thomie -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1851#comment:11> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9381: Implement rdynamic
by GHC 19 Aug '15

19 Aug '15

#9381: Implement rdynamic -------------------------------------+------------------------------------- Reporter: facundo.dominguez | Owner: Type: feature request | facundo.dominguez Priority: normal | Status: new Component: Compiler | Milestone: Keywords: | Version: 7.8.2 Architecture: Unknown/Multiple | Operating System: Difficulty: Unknown | Unknown/Multiple Blocked By: | Type of failure: Related Tickets: 7015 | None/Unknown | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Currently ghc ignores the `-rdynamic` flag. With a small effort it can be used as a synonym of `-optl -rdynamic` in linux and `-optl -export-all-symbols` in windows/mingw32. In other platforms, similar translations must be possible to get the symbols of an executable exported. This feature would improve usability of an upcoming implementation of #7015. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9381> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6037: Compile-time crash with sources with non-representable unicode characters
by GHC 19 Aug '15

19 Aug '15

#6037: Compile-time crash with sources with non-representable unicode characters -------------------------------------+------------------------------------- Reporter: akio | Owner: snoyberg Type: bug | Status: merge Priority: normal | Milestone: 7.10.3 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Linux | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: T6037 Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => merge * milestone: 7.12.1 => 7.10.3 Comment: Seems like this should go into a potential 7.10.3 if one happens. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6037#comment:13> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6037: Compile-time crash with sources with non-representable unicode characters
by GHC 19 Aug '15

19 Aug '15

#6037: Compile-time crash with sources with non-representable unicode characters -------------------------------------+------------------------------------- Reporter: akio | Owner: snoyberg Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Linux | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: T6037 Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Ben Gamari <bgamari.foss@…>): In [changeset:"22aca5368864070bbed3b44dca3ce57e243bf415/ghc" 22aca536/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="22aca5368864070bbed3b44dca3ce57e243bf415" Transliterate unknown characters at output This avoids the compiler from crashing when, for example, a warning contains a non-Latin identifier and the LANG variable is set to C. Fixes #6037. Test Plan: Create a Haskell source file containing an identifier with non-Latin characters and no type signature. Compile with `LANG=C ghc -Wall foo.hs`, and it should fail. With this patch, it will succeed. Reviewers: austin, rwbarton, bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1153 GHC Trac Issues: #6037, #10762 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6037#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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