[Bug c/107197] valgrind error in function same_line_p during build

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107197

--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
81 revisions to bisect. Trying e2a228438919d846.