Issue #16411: Fix a bug where zlib.decompressobj().flush() might try to access previously-freed memory.
Patch by Serhiy Storchaka.
diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index 6d4aa3a..6a772ad 100644
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -883,6 +883,8 @@
ENTER_ZLIB(self);
start_total_out = self->zst.total_out;
+ self->zst.avail_in = PyBytes_GET_SIZE(self->unconsumed_tail);
+ self->zst.next_in = (Byte *)PyBytes_AS_STRING(self->unconsumed_tail);
self->zst.avail_out = length;
self->zst.next_out = (Byte *)PyBytes_AS_STRING(retval);