Default bugzilla search doesn't include resolved, verified, and closed bugs. That said, I only found one slightly relevant, which was resolved invalid, saying the env var should be used:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10183
And that's just due to not freeing the pools, not whatever is the complex problem here.
[0] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=13823
Edited to add the following text.
There is one result[1] for GLIBCXX_FORCE_NEW.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65018