[Bug c++/26917] New: [4.0/4.1/4.2 regression] ICE with -frepo on invalid code

[reichelt at gcc dot gnu dot org]

Compiling a valid C++ file with -frepo and then editing the file
introducing bugs and then recompiling the file causes trouble:

For example:

Create the file "bug.cc" with the contents
===============
int i;
===============

Compile this file with "g++ -frepo -c bug.cc".

Then change the file to
===============
int ;
===============
and recompile it with the same command.

With mainline I get:

  bug.cc:1: error: declaration does not declare anything
  bug.cc:1: fatal error: error writing to /tmp/ccp9FkBp.s: Bad file descriptor
  compilation terminated.

With the 4.1 branch I get:

  bug.cc:1: error: declaration does not declare anything
  g++: Internal error: Segmentation fault (program cc1plus)
  Please submit a full bug report. [etc.]

With the 4.0 branch I get:

  bug.cc:1: error: declaration does not declare anything
  *** glibc detected *** malloc(): memory corruption: 0x00002aaaab106010 ***
  bug.cc:1: internal compiler error: Aborted
  Please submit a full bug report, [etc.]

With GCC 3.4.6 everything works fine, though.

Deleting the *.rpo file before recompiling solves the problem.


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with -frepo on invalid code
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26917