#15660: source file modify race leads to inconsistent error message -------------------------------------+------------------------------------- Reporter: joeyhess | Owner: (none) Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 8.2.2 Keywords: | Operating System: Linux Architecture: | Type of failure: Poor/confusing Unknown/Multiple | error message Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I got this odd error message from ghc: {{{ Command/AddUrl.hs:120:32: error: lexical error in string/character literal at character '-' | 120 | BatchNull -> '\0' | ^ }}} Part of the error message says that '-' is the problem character, but the quoted line of code does not contain that. What happened is I started the build, noticed I had typoed '\-' and quickly corrected it in my editor and saved. It seems ghc must have read the source file twice, so I raced it and so experienced this inconsistency. I wonder if it could display the wrong line entirely if a larger change was made to the file? Thanks for your time with such a minor thing as this bug. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15660 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler