#14113: Error message carets point at the wrong places in the presence of CPP macros -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Rufflewind):
What do you mean by "masks the problem"?
As in it will only hide the problem when the column number is obviously wrong (exceeds the length of the original line).
I'd be content with a solution similar to how `gcc` handles CPP macros when displaying carets:
I think gcc has some internal magic with its cpp (and same for clang). If you compile using `gcc -E wat.c | gcc -x c -` you will run into exactly the same bug here. {{{ wat.c: In function ‘main’: wat.c:4:12: warning: return makes integer from pointer without a cast [-Wint-conversion] FOO ^ }}} cpp simply does not provide ghc with adequate line information to determine the correct column. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14113#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler