GHC crashes when calling typeRep on a promoted tuple
The following code (asking for the typeRep of a promoted tuple) causes GHC to crash.
import Data.Typeable
import Data.Proxy
x = typeRep (Proxy::Proxy '(Int,Int))
The error message is:
[1 of 1] Compiling Main ( ../Bug.hs, interpreted )
GHC error in desugarer lookup in Main:
Can't find interface-file declaration for variable $tc'(,)
Probable cause: bug in .hi-boot file, or inconsistent .hi file
Use -ddump-if-trace to get an idea of which file caused the error
ghc-stage2: panic! (the 'impossible' happened)
(GHC version 8.1.20160518 for x86_64-unknown-linux):
initDs IOEnv failure
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
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Blocking | |
CC | |
Operating system | |
Architecture |