ghc: panic! (the 'impossible' happened) when using lowercase eq/show in deriving
Compiling the following:
module Main where
data Tree a = Edge a | Node (Tree a) (Tree a) deriving (eq,show)
main10 = print $ Node (Edge 10) (Edge 20)
main = main10
Results in:
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for i386-unknown-linux):
nameModule eq{tv a9O}
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 | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |