Your bug report

#63267: gcc-toolchain is missing libstdc++.so

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 63267@debbugs.gnu.org.

-- 
63267: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=63267
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems