#5513: panic! (the 'impossible' happened) on ‘deriving instance lowercase_name a’ ---------------------------------+------------------------------------------ Reporter: andersk | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.3 | Keywords: Testcase: | Blockedby: Os: Unknown/Multiple | Blocking: Architecture: Unknown/Multiple | Failure: Compile-time crash ---------------------------------+------------------------------------------ This bogus code: {{{ {-# LANGUAGE StandaloneDeriving #-} deriving instance lowercase_name a }}} causes current GHC HEAD to panic: {{{ ghc: panic! (the 'impossible' happened) (GHC version 7.3.20110927 for x86_64-unknown-linux): nameModule lowercase_name{tv aar}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} I also tested GHC 7.0.3, which correctly diagnosed the problem: {{{ crash.hs:2:19: Malformed instance header: lowercase_name a }}} -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5513> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs