[Bug tree-optimization/65661] New: ICE in operator[], at vec.h:736, called from partition_view_init

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65661

            Bug ID: 65661
           Summary: ICE in operator[], at vec.h:736, called from
                    partition_view_init
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org

$ gcc src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c
src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c: In function âf1â:
src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c:17:1: internal compiler
error: in operator[], at vec.h:736
 f1 (struct T x, int i)
 ^
0x6b2ac0 vec<tree_node*, va_gc, vl_embed>::operator[](unsigned int)
    /home/vries/gcc_versions/devel/src/gcc/vec.h:736
0xff2c45 partition_view_init
    /home/vries/gcc_versions/devel/src/gcc/tree-ssa-live.c:314
0xff2f25 partition_view_bitmap(_var_map*, bitmap_head*, bool)
    /home/vries/gcc_versions/devel/src/gcc/tree-ssa-live.c:394
0xfc9ccd coalesce_ssa_name()
    /home/vries/gcc_versions/devel/src/gcc/tree-ssa-coalesce.c:1335
0xf4d560 remove_ssa_form
    /home/vries/gcc_versions/devel/src/gcc/tree-outof-ssa.c:1018
0xf4dee5 rewrite_out_of_ssa(ssaexpand*)
    /home/vries/gcc_versions/devel/src/gcc/tree-outof-ssa.c:1252
0x823ef3 execute
    /home/vries/gcc_versions/devel/src/gcc/cfgexpand.c:5932
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