[Bug libstdc++/123100] std::ostringstream:str() (r-value version) returns garbage

[terra at gnome dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123100

--- Comment #8 from M Welinder <terra at gnome dot org> ---
The patch in comment 5 might get the right return value, but the buffer still
needs to be reset as specified.