id summary reporter owner description type status priority milestone component version resolution keywords cc os architecture failure difficulty testcase blockedby blocking related 314 #line pragmas not respected inside nested comments nobody "{{{ If one tries to compile a .hs file, with the -cpp option and the file contains C-style comments (/* comment */), then the linenumbers GHC reports are wrong. Minimal file exhibiting the error: --- {- /* * Copyright (c) 2005 Jesper Louis Andersen * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED ""AS IS"" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ -} c = 3 * ""string"" main = putStrLn $ show c ---- ; ghc -cpp tmp.hs tmp.hs:6: No instance for (Num [Char]) arising from use of `*' at tmp.hs:6 In the definition of `c': c = 3 * ""string"" Which is clearly wrong, since ``c'' is not defined on line 6. Note I am not sure wether it is in the parser, or it is rather in compilation chain where cpp gets invoked one has to look for the error. I have filed it as a parser-bug nonetheless. Fix: cpp(1) seems to output comments in the style # xx ""filename"" where ``xx'' is a number stating the linenumber in the original file. Keeping track of this probably fixes the bug. CPP version: GNU CPP from GCC 3.3.5 Operating System: OpenBSD 3.6-current (GENERIC) #1: Sun Feb 20 10:23:54 CET 2005 Submitter: Jesper Louis Andersen }}}" bug new high 7.8.1 Compiler (Parser) 6.4 None Unknown/Multiple Unknown/Multiple None/Unknown Unknown read032