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  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues

  • Open 91
  • Closed 459
  • All 550
New issue
  • Priority Created date Last updated Milestone due date Due date Popularity Label priority Manual Weight
  • NoFib : fasta benchmark produces unexpected output on slow/fast modes.
    #14557 · opened Dec 05, 2017 by Andreas Klebinger   5   Pnormal Trac import bug documentation incorrect runtime result nofib
    • CLOSED
    • 2
    updated Jul 07, 2019
  • Output value of program changes upon compiling with -O optimizations
    #14619 · opened Dec 26, 2017 by sheaf   8.4.1   10   Phighest Trac import bug code generation incorrect runtime result
    • CLOSED
    • 46
    updated Jul 07, 2019
  • GHC 8.4.1 regression: rank-n types no longer parenthesized when pretty-printed
    #14646 · opened Jan 08, 2018 by Ryan Scott   8.4.1   7   GHC API Phigh Trac import bug incorrect runtime result
    • CLOSED
    • 9
    updated Jul 07, 2019
  • More incorrect Template Haskell parenthesization
    #14681 · opened Jan 17, 2018 by Ryan Scott   5   Pnormal TemplateHaskell Trac import bug incorrect runtime result
    • CLOSED
    • 2
    updated Jul 07, 2019
  • Deriving Show with -XEmptyDataDeriving cases on the wrong argument
    #14692 · opened Jan 20, 2018 by Ryan Scott   8.4.1   7   Phigh Trac import bug deriving incorrect runtime result
    • CLOSED
    • 2
    updated Jul 07, 2019
  • -O1 changes result at runtime
    #14754 · opened Feb 03, 2018 by Bodigrim   8.4.1   10   Phighest Trac import bug incorrect runtime result
    • CLOSED
    • 10
    updated Jul 07, 2019
  • -O1 changes result at runtime, duplicating __DEFAULT case
    #14768 · opened Feb 06, 2018 by Bodigrim   8.4.1   10   Phighest Trac import bug incorrect runtime result
    • CLOSED
    • 9
    updated Jul 07, 2019
  • getNumCapabilities produces incorrect CPU counts
    #14781 · opened Feb 09, 2018 by rtfeldman   5   Pnormal RTS Trac import bug core libraries incorrect runtime result
    • CLOSED
    • 3
    • 5
    updated Sep 28, 2020
  • -O -g breaks string literals
    #14868 · opened Feb 28, 2018 by takano-akio   8.4.2   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 4
    updated Jul 07, 2019
  • GHC 8.4.1 regression: derived Read instances with field names containing # no longer parse
    #14918 · opened Mar 14, 2018 by Ryan Scott   8.4.2   7   Phigh Trac import bug deriving incorrect runtime result
    • CLOSED
    • 6
    updated Jul 07, 2019
  • Non-ASCII type names get garbled when their `TypeRep` is shown
    #14925 · opened Mar 15, 2018 by leftaroundabout   8.4.2   3   Plow Trac import Typeable Unicode bug core libraries incorrect runtime result
    • CLOSED
    • 3
    updated Jul 07, 2019
  • Hyperbolic area sine is unstable for (even moderately) big negative arguments.
    #14927 · opened Mar 15, 2018 by leftaroundabout   5   Pnormal Trac import bug core libraries incorrect runtime result
    • CLOSED
    • 7
    updated Jul 07, 2019
  • GHC 8.4.1 bug: -O + separate compilation + three list fields + concatenation; core-lint fails
    #14965 · opened Mar 23, 2018 by blynn   8.4.2   5   Pnormal Trac import bug debug information incorrect runtime result
    • CLOSED
    • 9
    updated Jul 07, 2019
  • Optimizer Casting Caf with nominal type
    #14967 · opened Mar 24, 2018 by etn   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 2
    updated Jul 07, 2019
  • GHC.Err.errorWithoutStackTrace produces stack trace when profiling enabled
    #14970 · opened Mar 24, 2018 by rotaerk   8.6.1   5   Pnormal Trac import bug core libraries incorrect runtime result
    • CLOSED
    • 6
    updated Jul 07, 2019
  • Small number of test case failures on Ubuntu Bionic (GCC 7.3)
    #15068 · opened Apr 20, 2018 by jrp2014   8.4.3   10   Phighest Trac import bug code generation incorrect runtime result
    • CLOSED
    • 37
    updated Jul 07, 2019
  • T8089 failing with ghci, threaded1, threaded2, profthreaded
    #15158 · opened May 16, 2018 by Alp Mestanogullari   8.6.1   5   Pnormal Trac import bug core libraries incorrect runtime result
    • CLOSED
    • 7
    updated Jul 07, 2019
  • `Language.Haskell.TH.Syntax.reify` returns * rather than Constraint
    #15198 · opened May 30, 2018 by benzrf   8.4.4   5   ConstraintKinds Pnormal TemplateHaskell Trac import bug incorrect runtime result
    • CLOSED
    • 2
    updated Jul 07, 2019
  • `-fno-state-hack` produces incorrect results in nofib
    #15225 · opened Jun 04, 2018 by Tobias Dammers   8.6.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 8
    updated Jul 07, 2019
  • 1e1000000000 :: Double yields 0.0 instead of Infinity
    #15271 · opened Jun 14, 2018 by claude   8.6.3   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 12
    updated Jul 07, 2019
  • Regression in Natural desugaring
    #15301 · opened Jun 22, 2018 by Sylvain Henry   8.6.1   10   Phighest Trac import bug incorrect runtime result
    • CLOSED
    • 2
    updated Jul 07, 2019
  • fixST is a bit wrong
    #15349 · opened Jul 06, 2018 by David Feuer   8.6.1   5   Pnormal Trac import broken test bug core libraries incorrect runtime result
    • CLOSED
    • 16
    updated Jul 07, 2019
  • Literals overflow
    #15460 · opened Jul 31, 2018 by Sylvain Henry   8.8.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 6
    updated Jul 07, 2019
  • Different results depending on if the code was compiled with or without optimizations
    #15686 · opened Sep 28, 2018 by Darwin226   8.4.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 1
    updated Jul 07, 2019
  • Derived Ord instance for enumerations with more than 8 elements seems to be incorrect
    #15696 · opened Oct 02, 2018 by mrkkrp   8.6.2   10   Phighest Trac import bug incorrect runtime result
    • CLOSED
    • 88
    updated Jul 18, 2019
  • problematic openFile with named pipes
    #15715 · opened Oct 07, 2018 by adp   8.6.3   5   API annotations Pnormal Trac import bug core libraries incorrect runtime result
    • CLOSED
    • 5
    updated Jul 07, 2019
  • SCC/HPC/CORE annotation can change the meaning of an expression
    #15730 · opened Oct 09, 2018 by Vladislav Zavialov   7   Phigh Trac import bug incorrect runtime result parser
    • CLOSED
    • 1
    • 7
    updated Jan 02, 2020
  • Testsuite failures from validate --slow
    #15736 · opened Oct 10, 2018 by jrp2014   10   Phighest Trac import bug incorrect runtime result testsuite
    • CLOSED
    • 26
    updated May 31, 2020
  • GhostScript not available for hp2ps tests
    #15856 · opened Nov 03, 2018 by jrp2014   8.8.1   5   Pnormal Trac import bug incorrect runtime result testsuite
    • CLOSED
    • 5
    updated Jul 07, 2019
  • Wrong size for int for callbacks into Haskell from foreign code
    #15933 · opened Nov 22, 2018 by Ilias Tsitsimpis   8.6.3   5   FFI Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 4
    • 8
    updated Jun 14, 2020
  • Show instance for Data.Fixed does not show parentheses for negatives
    #16031 · opened Dec 11, 2018 by skeuchel   8.8.1   5   Pnormal Trac import bug core libraries incorrect runtime result newcomer
    • CLOSED
    • 4
    updated Jul 07, 2019
  • seq is not cooperating with :sprint in GHCi as expected
    #16089 · opened Dec 23, 2018 by radrow   8.8.1   5   GHCi Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 15
    updated Jul 07, 2019
  • Inconsistent behavior of Data.Bits.shiftL with different optimization levels and -fllvm
    #16111 · opened Dec 30, 2018 by Ryan Scott   8.8.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 17
    updated Aug 29, 2020
  • ghc-pkg deadlocks on macOS
    #16147 · opened Jan 08, 2019 by rvl   8.6.4   5   Pnormal RTS Trac import bug incorrect runtime result
    • CLOSED
    • 7
    updated Jul 15, 2020
  • Data races in itimer_thread_func reported by ThreadSanitizer
    #16150 · opened Jan 08, 2019 by gnezdo   8.6.4   5   Pnormal RTS Trac import bug incorrect runtime result
    • CLOSED
    • 4
    updated Aug 20, 2019
  • Strictness is not preserved under -O1
    #16197 · opened Jan 17, 2019 by Alex Lang   8.8.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 8
    updated Jul 07, 2019
  • PPC NCG: C calling convention violated for integers smaller than word size
    #16222 · opened Jan 23, 2019 by Peter Trommler   8.10.1   5   FFI Pnormal PowerPC Trac import bug incorrect runtime result
    • CLOSED
    • 3
    • 2
    updated Jul 07, 2019
  • PowerPC Big-Endian: ArithInt16, ArithInt8, ArithWord16, and ArithWord8 fail
    #16258 · opened Jan 30, 2019 by Peter Trommler   8.10.1   5   Pnormal Trac import bug incorrect runtime result
    • CLOSED
    • 3
    • 5
    updated Jul 07, 2019
  • Fix for #14619 is wrong
    #16514 · opened Apr 01, 2019 by Duane Ryrag   8.6.5   8   Phigh Windows bug code generation incorrect runtime result
    • CLOSED
    • 6
    • 7
    updated Feb 25, 2020
  • KnownNat: result changes depending on optimizations
    #16586 · opened Apr 17, 2019 by Bodigrim   8.8.1   10   Phighest bug incorrect runtime result specialisation
    • CLOSED
    • 7
    • 23
    updated Feb 25, 2020
  • On x86_64, `castFloatToWord32` can generate bad, signed `Word32`s
    #16617 · opened May 01, 2019 by KevinBuhr   bug incorrect runtime result
    • CLOSED
    • 3
    • 1
    updated May 24, 2019
  • Optimizer produces Core with an infinite <<loop>> v2
    #17151 · opened Sep 04, 2019 by Alexey Kuleshevich   8.10.2   Phigh bug incorrect runtime result simplifier
    • CLOSED
    • 6
    updated Apr 07, 2020
  • Rounding always throws an arithmetic underflow exception when used with a ratio of natural numbers
    #17303 · opened Oct 04, 2019 by taylorfausak   8.10.1   Phigh bug core libraries incorrect runtime result
    • CLOSED
    • 0
    updated Dec 06, 2019
  • Data.Fixed.mod' sometimes produces nonsensical results
    #17383 · opened Oct 21, 2019 by Roman Cheplyaka   8.10.1   Phigh bug core libraries incorrect runtime result
    • CLOSED
    • 1
    updated Oct 31, 2019
  • Runtime loop when using eqT
    #17458 · opened Nov 09, 2019 by Max Harms   Pnormal QuantifiedConstraints Typeable bug incorrect runtime result
    • CLOSED
    • 11
    updated Nov 13, 2019
  • text has different runtime behavior between GHC 8.6.5 and 8.8.1
    #17678 · opened Jan 13, 2020 by Ryan Scott   bug incorrect runtime result
    • CLOSED
    • 4
    updated Jan 13, 2020
  • OFD locking breaks on 32-bit glibc
    #17950 · opened Mar 23, 2020 by Ben Gamari   8.10.2   Phigh bug core libraries incorrect runtime result
    • CLOSED
    • 1
    • 2
    updated Jun 26, 2020
  • Global variables in GHC.IO.Encoding have inappropriate inlinings
    #17970 · opened Mar 28, 2020 by Ben Gamari   8.10.2   Phigh bug core libraries incorrect runtime result
    • CLOSED
    • 5
    • 2
    updated Mar 31, 2020
  • Eta-expansion of a left-section
    #18151 · opened May 06, 2020 by Richard Eisenberg   9.0.1   Pnormal bug incorrect runtime result report impact typechecker
    • CLOSED
    • 1
    • 8
    updated Jan 12, 2021
  • Optimisation removes effectful computation.
    #18527 · opened Aug 03, 2020 by Tobias Decking   Phigh Windows bug code generation incorrect runtime result
    • CLOSED
    • 4
    • 13
    updated Aug 16, 2020
  • Bignum: natural subtraction sometimes wrong
    #18604 · opened Aug 24, 2020 by Sylvain Henry   Phighest bug ghc-bignum incorrect runtime result
    • CLOSED
    • 1
    updated Oct 12, 2020
  • Global ImplicitParams technique doesn't work with optimizations enabled
    #18627 · opened Aug 31, 2020 by Dmitrii Kovanikov   ImplicitParams bug incorrect runtime result needs triage
    • CLOSED
    • 5
    • 6
    updated Oct 13, 2020
  • Segfault on s390x due to missing sign/zero extend
    #19023 · opened Dec 03, 2020 by Stefan Schulze Frielinghaus   LLVM backend bug incorrect runtime result s390x
    • CLOSED
    • 8
    • 4
    updated Jan 26, 2021
  • CPP def name typo: THREADEDED_RTS
    #19057 · opened Dec 13, 2020 by Csaba Hruska   RTS bug incorrect runtime result
    • CLOSED
    • 3
    • 2
    updated Dec 19, 2020
  • arithmetic sequence discrepancy
    #19080 · opened Dec 17, 2020 by DOUGLAS MCILROY   Phigh bug core libraries incorrect runtime result
    • CLOSED
    • 6
    updated Dec 17, 2020
  • ghci's :type still ignores ill-kinded type application with -fdefer-type-errors
    #19158 · opened Jan 03, 2021 by Jakob Brünker   GHCi Pnormal bug deferred type errors incorrect runtime result
    • CLOSED
    • 4
    • 2
    updated Jan 22, 2021
  • Natural shiftL 0 65 not equal to 0
    #19170 · opened Jan 05, 2021 by Christiaan Baaij   9.0.1   Phighest bug ghc-bignum incorrect runtime result
    • CLOSED
    • 5
    • 1
    updated Jan 29, 2021
  • Type literals in Reflection of type constructor kinds leads to SafeHaskell violation
    #19288 · opened Jan 31, 2021 by Kyle Ehrlich   9.0.2   Typeable bug incorrect runtime result needs triage
    • CLOSED
    • 3
    • 6
    updated Feb 05, 2021
  • Optimisations cause incorrect runtime result in Integer calculation
    #19345 · opened Feb 10, 2021 by sheaf   9.0.1   Phighest backport bug ghc-bignum incorrect runtime result
    • CLOSED
    • 9
    updated Feb 16, 2021
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