[Bug libstdc++/81395] [5/6/7/8 Regression] basic_filebuf::overflow recurses and overflows stack

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81395

--- Comment #10 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Yes, I agree with your analysis, something seems wrong. I suspsect going to a
normal uncommitted mode, thus not setting _M_reading would largely work, but I
fear performance implications, etc. I would strongly recommend analyzing next
what can wrong if _M_reading remains false after that (a) reading operation...