[Bug pch/78508] valgrind error in gt_pch_note_object when compiling C++

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78508

--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Still broken, a couple of months later, in gcc dated 2017 Jan 13.