https://github.com/python/cpython/commit/d0c92e81aa2171228a23cb2bed36f7dab97... commit: d0c92e81aa2171228a23cb2bed36f7dab975257d branch: master author: Batuhan Taşkaya <47358913+isidentical@users.noreply.github.com> committer: Benjamin Peterson <benjamin@python.org> date: 2019-12-30T18:31:52-08:00 summary: closes bpo-37446: resolve undefined behavior in Python/hamt.c (GH-17727) files: M Python/hamt.c diff --git a/Python/hamt.c b/Python/hamt.c index ea659c800fc46..f5586eec5b076 100644 --- a/Python/hamt.c +++ b/Python/hamt.c @@ -1864,7 +1864,7 @@ hamt_node_array_without(PyHamtNode_Array *self, continue; } - bitmap |= 1 << i; + bitmap |= 1U << i; if (IS_BITMAP_NODE(node)) { PyHamtNode_Bitmap *child = (PyHamtNode_Bitmap *)node;