[Bug preprocessor/48248] [4.5/4.6/4.7 Regression] Wrong error message location when compiling preprocessed code

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48248

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.03.23 09:41:27
                 CC|                            |tromey at gcc dot gnu.org
   Target Milestone|---                         |4.5.3
            Summary|Wrong error message         |[4.5/4.6/4.7 Regression]
                   |location when compiling     |Wrong error message
                   |preprocessed code           |location when compiling
                   |                            |preprocessed code
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-23 
09:41:27 UTC ---
Confirmed.

> g++-4.5 -S foo.c -save-temps
foobar.h: In function ‘void func()’:
foobar.h:8:3: error: ‘aaa’ was not declared in this scope

and preprocessed source looks like

# 1 "foo.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "foo.c"
# 1 "foobar.h" 1
enum Foo
{
    BAR
};
# 2 "foo.c" 2



void func()
{
  (void)
# 6 "foobar.h"
               BAR
              ;
  aaa;
}

we miss to switch back to foo.c.  4.4 does not switch to foobar.h at all.