gh-126775: make linecache.checkcache threadsafe and GC re-entrency safe#126776

cfbolz merged 8 commits intopython:mainpython/cpython:mainfrom

graingert:make-linecache-clearcache-thread-and-gc-reentrant-safegraingert/cpython:make-linecache-clearcache-thread-and-gc-reentrant-safeCopy head branch name to clipboard