#11331: panic! TEST=tc198: lookupVers2 GHC.Stack.Types CallStack -------------------------------------+------------------------------------- Reporter: thomie | Owner: gridaphobe Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): I ran into this problem a few weeks ago. It seems that the place where `GHC.Stack.Types` normally gets loaded is the `dsLookupDataCon` call in `DsBinds.dsEvCallStack`. I found this peculiar at the time (why doesn't it get loaded earlier?) but the original source of the error (for me) was elsewhere. When I fixed that (to produce an `EvCallStack`), the problem went away. I don't know why this all is happening, but the knowledge that that particular call of `dsLookupDataCon` triggers loading in the successful case was a bit hard-won, so I thought I'd share. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11331#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler