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[GHC] #9815: Runtime error with RecordWildCards and a non-record constructor
by GHC 21 Nov '14

21 Nov '14

#9815: Runtime error with RecordWildCards and a non-record constructor -------------------------------------+------------------------------------- Reporter: akio | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Keywords: RecordWildCards, | Operating System: warning | Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: GHC Difficulty: Unknown | accepts invalid program Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- The following program is accepted with no warning, and crashes at runtime with an error: {{{#!hs {-# LANGUAGE RecordWildCards #-} newtype N = N Int deriving (Show) main = print N{..} }}} {{{ % runghc wildcards.hs wildcards.hs: wildcards.hs:4:14-18: Missing field in record construction }}} I find this behavior surprising. Would it be better to either disallow it or have `-fwarn-missing-fields` warn it? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9815> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7220: Confusing error message in type checking related to type family, fundep, and higher-rank type
by GHC 21 Nov '14

21 Nov '14

#7220: Confusing error message in type checking related to type family, fundep, and higher-rank type -------------------------------------+------------------------------------- Reporter: tsuyoshi | Owner: simonpj Type: bug | Status: closed Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.6.1-rc1 (Type checker) | Keywords: Resolution: fixed | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | typecheck/should_fail/T7220 | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"7b1a8562d9b92547251d0dff23bb3a2de25d4b6f/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="7b1a8562d9b92547251d0dff23bb3a2de25d4b6f" Fix up tests for Trac #7220; the old test really was ambiguous }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7220#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9222: Unexpected DataKind Panic
by GHC 21 Nov '14

21 Nov '14

#9222: Unexpected DataKind Panic -------------------------------------------+------------------------------- Reporter: ekmett | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type checker) | Version: 7.8.2 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: -------------------------------------------+------------------------------- Here's a simplified version of a panic I'm getting: {{{ {-# LANGUAGE RankNTypes, GADTs, DataKinds, PolyKinds, TypeOperators, TypeFamilies #-} import Data.Proxy data Want :: (i,j) -> * where Want :: (a ~ '(b,c) => Proxy b) -> Want a }}} {{{ GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. ghc: panic! (the 'impossible' happened) (GHC version 7.8.2 for x86_64-apple-darwin): tcTyVarDetails k{tv aAv} [tv] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9222> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3650: Add a Natural number type to the pre-defined basic types.
by GHC 21 Nov '14

21 Nov '14

#3650: Add a Natural number type to the pre-defined basic types. -------------------------------------+------------------------------------- Reporter: JohnD | Owner: Type: proposal | Status: closed Priority: normal | Milestone: Component: Compiler | Version: (Type checker) | Keywords: Resolution: wontfix | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: #9818 None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by hvr): * difficulty: => Unknown * related: => #9818 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3650#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7942: aarch64 support in ghc
by GHC 21 Nov '14

21 Nov '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: bug | Status: patch Priority: high | Milestone: 7.10.1 Component: Compiler | Version: Resolution: | Keywords: Operating System: Linux | Architecture: arm Type of failure: GHC | Difficulty: Unknown doesn't work at all | Blocked By: Test Case: | Related Tickets: 7623, 8664 Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by lukexi): * status: new => patch -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:55> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7942: aarch64 support in ghc
by GHC 21 Nov '14

21 Nov '14

#7942: aarch64 support in ghc -------------------------------------+------------------------------------- Reporter: jcapik | Owner: Type: bug | Status: new Priority: high | Milestone: 7.10.1 Component: Compiler | Version: Resolution: | Keywords: Operating System: Linux | Architecture: arm Type of failure: GHC | Difficulty: Unknown doesn't work at all | Blocked By: Test Case: | Related Tickets: 7623, 8664 Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by lukexi): * status: closed => new * resolution: fixed => -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7942#comment:54> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2526: Warn about missing signatures only for exported functions
by GHC 21 Nov '14

21 Nov '14

#2526: Warn about missing signatures only for exported functions -------------------------------------+------------------------------------- Reporter: | Owner: gridaphobe fergushenderson | Status: closed Type: feature | Milestone: 7.10.1 request | Version: 6.8.3 Priority: lowest | Keywords: newcomer Component: Compiler | Architecture: Unknown/Multiple Resolution: fixed | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: Type of failure: | None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thoughtpolice): * status: new => closed * resolution: => fixed Comment: Merged, thanks! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2526#comment:18> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9368: Add strictly accumulating scanl' to Data.List
by GHC 21 Nov '14

21 Nov '14

#9368: Add strictly accumulating scanl' to Data.List -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Easy (less than 1 | Type of failure: hour) | None/Unknown Blocked By: | Test Case: Related Tickets: #9345 | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Joachim Breitner wrote a strictly accumulating fusable `scanl'` in a comment on #9345, and demonstrated that it can produce spectacularly good code. Therefore, it seems like a good thing to have in Data.List. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9368> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2526: Warn about missing signatures only for exported functions
by GHC 21 Nov '14

21 Nov '14

#2526: Warn about missing signatures only for exported functions -------------------------------------+------------------------------------- Reporter: | Owner: gridaphobe fergushenderson | Status: new Type: feature | Milestone: 7.10.1 request | Version: 6.8.3 Priority: lowest | Keywords: newcomer Component: Compiler | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: Type of failure: | None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by Austin Seipp <austin@…>): In [changeset:"067f1e4f20efc824badbac54da2f9484090cb39b/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="067f1e4f20efc824badbac54da2f9484090cb39b" Add flag `-fwarn-missing-exported-sigs` Summary: add `-fwarn-missing-exported-sigs` to only warn about missing signatures if the name is exported Test Plan: validate, see testsuite/tests/warnings/should_compile/T2526.hs Reviewers: ezyang, austin, thomie Reviewed By: austin, thomie Subscribers: ezyang, thomie, carter Differential Revision: https://phabricator.haskell.org/D482 GHC Trac Issues: #2526 Conflicts: docs/users_guide/7.10.1-notes.xml }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2526#comment:17> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5462: Deriving clause for arbitrary classes
by GHC 21 Nov '14

21 Nov '14

#5462: Deriving clause for arbitrary classes -------------------------------------+------------------------------------- Reporter: simonpj | Owner: dreixel Type: feature | Status: patch request | Milestone: 7.10.1 Priority: normal | Version: 7.2.1 Component: Compiler | Keywords: Generics Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: #7346 None/Unknown | Test Case: | Blocking: | Differential Revisions: Phab:D476 | -------------------------------------+------------------------------------- Comment (by Austin Seipp <austin@…>): In [changeset:"7ed482d909556c1b969185921e27e3fe30c2fe86/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="7ed482d909556c1b969185921e27e3fe30c2fe86" Implement #5462 (deriving clause for arbitrary classes) Summary: (this has been submitted on behalf on @dreixel) Reviewers: simonpj, hvr, austin Reviewed By: simonpj, austin Subscribers: goldfire, thomie, carter, dreixel Differential Revision: https://phabricator.haskell.org/D476 GHC Trac Issues: #5462 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5462#comment:47> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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