panic when using function in 'deriving' data declaration
Hello. I haven't found any matching bugs for this. To reproduce:
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Start up ghci
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Enter something like the following, which contains a typo 'show' instead of 'Show'.
data Test = Yes | No deriving (show, Eq)- ghci will panic saying:
Prelude> data Test = Yes | No deriving (show, Eq)
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.2 for i386-unknown-linux):
nameModule show{tv aa0}Notes:
- The 'show' can be substituted with any other function name
- It also happens on x86_64.
- It also happens when putting such a line into a .hs file and trying to compile it
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.4.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
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