[Bug c++/56673] New: multi-versioning not GC safe

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56673

             Bug #: 56673
           Summary: multi-versioning not GC safe
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rguenth@gcc.gnu.org
                CC: tmsriram@google.com


If you build for example g++.dg/ext/mv1.C with --param ggc-min-expand=0 --param
ggc-min-heapsize=0 (or a compiler with gcac checking enabled) you hit

/space/rguenther/src/svn/trunk/gcc/testsuite/g++.dg/ext/mv1.C: In function 'int
foo()':
/space/rguenther/src/svn/trunk/gcc/testsuite/g++.dg/ext/mv1.C:70:6: internal
compiler error: Segmentation fault
0xcd3b09 crash_signal
        /space/rguenther/src/svn/trunk/gcc/toplev.c:332
0x13dc1d6 htab_find
        /space/rguenther/src/svn/trunk/libiberty/hashtab.c:630
0x9078e7 get_cgraph_node_version(cgraph_node*)
        /space/rguenther/src/svn/trunk/gcc/cgraph.c:177
0x907ae7 record_function_versions(tree_node*, tree_node*)
        /space/rguenther/src/svn/trunk/gcc/cgraph.c:244
0x5d8d2b decls_match(tree_node*, tree_node*)
        /space/rguenther/src/svn/trunk/gcc/cp/decl.c:1062
0x7de156 pushdecl_maybe_friend_1
        /space/rguenther/src/svn/trunk/gcc/cp/name-lookup.c:711
0x7e19c5 pushdecl_maybe_friend(tree_node*, bool)
        /space/rguenther/src/svn/trunk/gcc/cp/name-lookup.c:1221
0x7e19fc pushdecl(tree_node*)
        /space/rguenther/src/svn/trunk/gcc/cp/name-lookup.c:1231
...