[Bug preprocessor/52998] caret and -ftrack-macro-expansion don't mix well

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52998

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-04-15 20:37:44 UTC ---
(In reply to comment #1)
> I think with and without macro expansion, the error should be given at 13:3,
> and unwind from outermost to innermost. Innermost to outermost makes sense if
> we show preprocessed lines:
> 
> macro-caret.c:5:14: error: invalid operands to binary << (have ‘double’ and
> ‘int’)
>    1.0 << 1
>        ^

But with preprocessed source lines, the best location is 5:14, because this way
the user can compare what is in that line with the preprocessed line shown by
GCC. So, in some sense, cc1 is right, and cc1plus is wrong.