[Bug middle-end/120987] [14/15/16 regression] gdb build with lto triggers use after free since r14-5831-gaae723d360ca26

[vries at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120987

--- Comment #17 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 61839
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61839&action=edit
test-2.c

I've minimized it, and dropped the print:
...
$ for n in 0 1 2; do g++ test-2.c -O$n; ./a.out ; echo $?; done
0
1
1
...