https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58266
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- I doubt this is a bug in libstdc++. It's only a "possibly lost" report, but even if there's a real problem it's more likely to be in matplotlib. Please reopen if you have code to reproduce the problem, otherwise this is too vague to do anything about.