Issues · Glasgow Haskell Compiler / GHC · GitLab

GHC 9.0 rejects default signature that 8.10 accepts

#19432 · opened Feb 25, 2021 by Ryan Scott DefaultSignatures bug program incorrectly rejected typechecker
- 12
updated Feb 26, 2021
Deprecate `-Winaccessible-code`

#19428 · opened Feb 23, 2021 by Sebastian Graf needs triage pattern match warnings typechecker
- 3
updated Feb 25, 2021
GHC 9.0 unable to deduce that instance signature is at least as general as class signature

#19419 · opened Feb 23, 2021 by sheaf InstanceSigs typechecker
- CLOSED
- 2
updated Feb 25, 2021
Surprising lack of generalisation using MonoLocalBinds

#19396 · opened Feb 17, 2021 by Tom Ellis feature request typechecker
- 7
updated Feb 26, 2021
oversized source range in type error message

#19364 · opened Feb 13, 2021 by jwaldmann Pnormal bug error messages typechecker
- 1
updated Feb 26, 2021
GHC 9.0 regression: plots-0.1.1.2 fails to build due to ambiguous type variable

#19315 · opened Feb 03, 2021 by Ryan Scott 9.0.2 Phighest bug program incorrectly rejected typechecker
- CLOSED
- 11
updated Feb 10, 2021
E-Graphs for representation of normalised refinement types in the pattern-match checker

#19272 · opened Jan 28, 2021 by Sebastian Graf pattern match warnings simplifier task typechecker
- 1
updated Jan 29, 2021
‘:kind () :: '()’ doesn't give any output

#19197 · opened Jan 09, 2021 by Icelandjack GHCi bug needs triage typechecker
- CLOSED
- 1
- 2
updated Jan 18, 2021
TypeInType prevents Typeable from being resolved from a given

#19196 · opened Jan 08, 2021 by Serge Kosyrev TypeInType Typeable program incorrectly rejected typechecker
- CLOSED
- 3
updated Jan 11, 2021
Regression around overloaded literals and type applications

#19167 · opened Jan 04, 2021 by Richard Eisenberg 9.2.1 OverloadedStrings RebindableSyntax TypeApplications typechecker
- CLOSED
- 2
updated Feb 21, 2021
GHC 9.0 no longer typechecks a program involving overloaded labels and type applications

#19154 · opened Jan 02, 2021 by sheaf 9.2.1 bug program incorrectly rejected typechecker
- CLOSED
- 5
- 8
updated Feb 22, 2021
panic lookup_final_id with -fdefer-type-errors and kind error in instance definition

#19142 · opened Dec 31, 2020 by Jakob Brünker Pnormal bug compiler crash deferred type errors typechecker
- CLOSED
- 3
- 6
updated Jan 22, 2021
panic: No skolem info when trying to use variable with polymorphic kind as Type/Constraint

#19140 · opened Dec 31, 2020 by Jakob Brünker 9.2.1 RankNTypes bug compiler crash needs triage typechecker
- CLOSED
- 1
updated Dec 31, 2020
Incorrect documentation around EqualCtList

#19137 · opened Dec 30, 2020 by Richard Eisenberg constraint solver typechecker
- 0
updated Dec 30, 2020
Does the sub-type check in Note [Impedance matching] ever fail?

#19131 · opened Dec 27, 2020 by Richard Eisenberg task typechecker
- 3
updated Feb 17, 2021
GADT pattern match defeats instance solving

#19107 · opened Dec 22, 2020 by Richard Eisenberg constraint solver typechecker
- CLOSED
- 2
- 5
updated Jan 25, 2021
Partial type signature variable confuses instance solving

#19106 · opened Dec 22, 2020 by Richard Eisenberg constraint solver partial type sigs typechecker
- CLOSED
- 2
- 2
updated Jan 25, 2021
Make the canonicaliser do unification

#19060 · opened Dec 14, 2020 by Simon Peyton Jones task typechecker
- 0
updated Dec 14, 2020
Allow named wildcards in constraints

#19051 · opened Dec 10, 2020 by sheaf partial type sigs typechecker
- 8
updated Dec 23, 2020
Regression: HEAD requires FlexibleContexts because of inferred, redundant constraint

#19044 · opened Dec 09, 2020 by Ryan Scott 9.2.1 OverlappingInstances Phighest bug program incorrectly accepted typechecker
- CLOSED
- 3
- 4
updated Dec 19, 2020

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