#12926: ghc master (8.1.20161202) panics with assertion failure with devel2 flavor and -O2 -------------------------------------+------------------------------------- Reporter: pacak | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): Ryan, are you trying with a `-DDEBUG` build? You will need `GhcStage2HcOpts += -DDEBUG` in your `build.mk`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12926#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler