bpo-45061: Detect refcount bug on empty string singleton #28504
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Detect refcount bugs in C extensions when the empty Unicode string singleton is destroyed by mistake. * Move forward declarations to the top of unicodeobject.c. * Simplifiy unicode_is_singleton().
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Detect refcount bugs in C extensions when the empty Unicode string
singleton is destroyed by mistake.
https://bugs.python.org/issue45061