GCC 15 and 16 regression causes frame memory leaks

[Gheith, Ahmed via Gcc]

The attached program works as expected when compiled with g++ 14 but reports 
leaks with both g++ 15 and 16.

Visual inspection of the generated code suggests that it’s related to replace 
an atomic sub in g++ 14 with a non-atomic one in g++ 15.

To compile: g++ -std=c++23 -pthread frame_leak.cc =

frame_leak.cc
Description: frame_leak.cc