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

[vries at gcc dot gnu.org]

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

--- Comment #1 from vries at gcc dot gnu.org ---
At -O2, it's called from parition_to_var:
...
$ gcc src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c -O2
src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c: In function ‘f1’:
src/gcc/testsuite/c-c++-common/ubsan/object-size-9.c:97:1: internal compiler
error: in operator[], at vec.h:736
 }
 ^
0x6b2ac0 vec<tree_node*, va_gc, vl_embed>::operator[](unsigned int)
    /home/vries/gcc_versions/devel/src/gcc/vec.h:736
0xfcd71c partition_to_var
    /home/vries/gcc_versions/devel/src/gcc/tree-ssa-live.h:107
0xfce796 execute
    /home/vries/gcc_versions/devel/src/gcc/tree-ssa-copyrename.c:469
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