#14075: GHC panic with parallel make -------------------------------------+------------------------------------- Reporter: inaki | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.2.2 Component: Compiler | Version: 8.2.1 Resolution: | Keywords: hs-boot Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #13803, #13981 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by ezyang): In parallel mode I see: {{{ Re-typechecking loop: [F, F] compile: input file F.hs *** Checking old interface for F (use -ddump-hi-diffs for more details): [3 of 4] Compiling F ( F.hs, F.o ) }}} which is wrong wrong wrong; the retypecheck loop MUST NOT contain F (compare with non-parallel output; nothing needs to get retypechecked before we do F). So this is definitely a parallel specific bug. Workaround should be to not use parallel compilation. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14075#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler