#7918: SrcSpan's associated with expanded quasi-quotes are inconsistent -------------------------------------+------------------------------------ Reporter: edsko | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 7.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by edsko): As demonstrated by the attached example, the problem still persists in GHC HEAD. The output of the program is {{{ Found HsVar GHC.Types.False at T7918B.hs:7:7-13 Found HsVar GHC.Types.True at T7918B.hs:6:11-13 Found HsVar GHC.Classes.|| at T7918B.hs:6:11-13 Found HsVar GHC.Types.False at T7918B.hs:6:11-13 Found HsVar GHC.Types.True at T7918B.hs:6:11-13 Found HsVar GHC.Classes.|| at T7918B.hs:6:11-13 Found HsVar GHC.Types.False at T7918B.hs:6:11-13 Found HsVar GHC.Types.True at T7918B.hs:6:11-13 Found HsVar GHC.Classes.|| at T7918B.hs:6:11-13 Found HsVar GHC.Types.False at T7918B.hs:6:11-13 Found HsVar GHC.Types.True at T7918B.hs:6:11-13 Found HsVar GHC.Classes.|| at T7918B.hs:6:11-13 Found HsVar GHC.Types.False at T7918B.hs:6:11-13 Found HsVar GHC.Types.True at T7918B.hs:5:11-13 Found HsVar GHC.Types.True at T7918B.hs:5:11-13 Found HsVar GHC.Types.True at T7918B.hs:4:7-13 }}} Note the 7-13 rather than 11-13 in the first and last line. Note that this is the source span associated with the HsVar, not with the larger expression (which is, indeed, consistent across the 4 quasi-quotes). I will try and see if I can come up with a patch for this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7918#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler