[Bug debug/67192] Backward-goto in loop can get wrong line number

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67192

--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Problem also affects while statements; reproduced using example from comment #0
w with "for (;;)" replaced with "while (1)"