Issues · Glasgow Haskell Compiler / GHC · GitLab

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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