#8276: Building Haddock documentation panics with perf build on x86_64 Linux ---------------------------------------+---------------------------------- Reporter: jstolarek | Owner: Type: bug | Status: new Priority: high | Milestone: Component: Documentation | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: x86_64 (amd64) Type of failure: Compile-time crash | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: ---------------------------------------+---------------------------------- Comment (by darchon): The problem is that pretty-printing (code in `Outputable.hs`) an error tries to access the staticFlag "-dppr-debug". For some weird reason, the staticFlags are not parsed when the error message is converted to a String; that's the reason for this bug. The error that it is trying to print is #8320, but I don't think the error would only show up for that particular failure. What my patch does is not revert static flags to their unparsed state in the exception handling code of haddock. It makes this particular error go away, but it is not a proper fix. I find it weird that the exception handler can unparse the static flags before the error is converted to a string. Perhaps there is a way to force the error to printed before the staticFlags are unparsed? Also I want to point out that this bug, and the problem reported in https://github.com/sol/doctest-haskell/issues/59, are each others inverse: where the conflicting code in this bug expects staticFlags to be parsed, "kazu's" code expects the staticFlags not to be parsed yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8276#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler