GHC panic (nameModule) on malformed deriving clause
Trying to derive a classname starting with a lower case letter and wrapped in parenthesis will lead to a ghc panic instead of generating an error
minimal testcase:
module Foo where
data Foo = Foo deriving (abc)
output:
[1 of 1] Compiling Foo ( scratch3.hs, scratch3.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
nameModule abc{tv a9I}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
Trac field | Value |
---|---|
Version | 7.4.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
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Blocking | |
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