#10628: clang's cpp causes incorrect line numbers in type errors -------------------------------------+------------------------------------- Reporter: gridaphobe | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Keywords: | Operating System: MacOS X Architecture: | Type of failure: Incorrect Unknown/Multiple | warning at compile-time Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- If I run GHC on {{{ {-# LANGUAGE CPP #-} module Foo where foo :: String foo = True }}} I get an error {{{ Foo.hs:7:7: Couldn't match type ‘Bool’ with ‘[Char]’ Expected type: String Actual type: Bool In the expression: True In an equation for ‘foo’: foo = True }}} but the type error is on line 6, not line 7. It seems to have something to do with the fact that line 2 starts with a `#` since the error is reported correctly if I make the language pragma a single line. GHC on linux reports the correct location, as does GHC on OS X if I use any other language pragma, so I'm pretty sure this is another instance of clang's `cpp` causing problems for us. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10628 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler