[Bug libgcc/109685] [13/14 Regression] Memory leak in `__deregister_frame`

[tneumann at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109685

--- Comment #2 from Thomas Neumann <tneumann at users dot sourceforge.net> ---
I can reproduce the issue. The attached patch fixes the problem, I will send it
for reviewing.