[Bug c/18164] New: ICE on trivial invalid asm

["jsm28 at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

void
f (void)
{
  int x;
  asm ("" : "" (x));
}

yields an ICE (discovered while attempting to disallow wide strings in asms)

t.c: In function 'f':
t.c:5: error: output operand constraint lacks '='
t.c:5: error: output operand constraint lacks '='
t.c:5: error: invalid lvalue in asm output 0
t.c:5: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

This appears to be fairly recent:

: Search converges between 2004-10-09-014001-trunk (#585) and
2004-10-09-161001-trunk (#586).

-- 
           Summary: ICE on trivial invalid asm
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jsm28 at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164