GHC panic with invalid expression
Hi, I recently discovered this expression causes GHC to panic. Shouldn't it handle this more gracefully? Perhaps saying something like "That expression is not valid. <Further Explanation>"
Invalid expression:
g :: (a->b) a
Prelude> g :: (a->b) a
ghc: panic! (the 'impossible' happened)
(GHC version 8.2.1 for x86_64-apple-darwin):
repSplitAppTys
a_a1Lz[sk:1]
b_a1LA[sk:1]
[]
Call stack:
CallStack (from HasCallStack):
prettyCurrentCallStack, called at compiler/utils/Outputable.hs:1133:58 in ghc:Outputable
callStackDoc, called at compiler/utils/Outputable.hs:1137:37 in ghc:Outputable
pprPanic, called at compiler/types/Type.hs:808:9 in ghc:Type
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | MacOS X |
Architecture |