Hello,
When decompressing GCC source files, somme files have their filename truncated, like gcc-7.3.0.tar.gz\gcc-7.3.0.tar\gcc-7.3.0\libstdc++-v3\include\ext\pb_ds\detail\resize_policy\hash_load_c k_resize_trigger_size_ba (missing "se.hpp"!). Same problem with gcc-7.3.0.tar.xz ...
I use version 18.05 x64 on Windows 10.
It will be fixed in next version of 7-Zip.