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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
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  • #2475
Closed
Open
Issue created Jul 31, 2008 by Ian Lynagh <igloo@earth.li>@trac-igloo

debugger gives "Can't unify" when stopped at an exception

Presumably due to exceptions now using existential types, the GHCi debugger now gives:

ghc: panic! (the 'impossible' happened)
  (GHC version 6.9.20080731 for x86_64-unknown-linux):
   Can't unify

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

when it stops at an exception. See break011 and break024 for testcases.

Trac metadata
Trac field Value
Version 6.8.3
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component GHCi
Test case break011, break024
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