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PEP 688: Crash if __release_buffer__ is called while an exception is active #104371
Description
class A:
def __buffer__(self, flags):
return memoryview(bytes(8))
def __release_buffer__(self, view):
pass # do not need to do anything here, just needs to exist
b = bytearray(8)
m = memoryview(b) # now b.extend will raise an exception due to exports
b.extend(A())
In a debug build this crashes with Assertion failed: (!PyErr_Occurred()), function _PyType_Lookup, file typeobject.c, line 4707.
Reported by @chilaxan. I'll work on a fix later today.
Most likely, the fix will be to call PyErr_Fetch/PyErr_Restore around calls to Python __release_buffer__ methods.
Activity
pythongh-104371: Fix calls to __release_buffer__ while an exception i…
gh-104371: Fix calls to `__release_buffer__` while an exception is ac…
GH-104371: check return value of calling `mv.release` (#104417)
Merge branch 'main' into supermon