[Bug c/108746] backtrace overwrites other memory

[vitiral at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108746

--- Comment #1 from Garrett vitiral <vitiral at gmail dot com> ---
Sorry, I should have used standard types instead of my aliases for the example
code

  void* m[100] = {0};
  size_t len = backtrace(m, 100);