BUG: Fix missing check for PyErr_Occurred() in _pyarray_correlate. #28916
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…umpy#28898) When running the scipy 1.15 test suite test signal/tests/test_signaltools.py::test_lfilter_bad_object, with Python built in debug mode, we see the following error: ``` Fatal Python error: _Py_CheckSlotResult: Slot * of type float succeeded with an exception set ``` `None` ends up as the first argument to `dot`, and this triggers an error from PyFloat_Multiply. Once an error has occurred, we must avoid calling multiply again, since it asserts that PyErr_Occurred() is false if the output is a non-error, which will fail if an error was set at entry.
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Backport of #28898.
When running the scipy 1.15 test suite test
signal/tests/test_signaltools.py::test_lfilter_bad_object, with Python built in debug mode, we see the following error:
Noneends up as the first argument todot, and this triggers an error from PyFloat_Multiply. Once an error has occurred, we must avoid calling multiply again, since it asserts that PyErr_Occurred() is false if the output is a non-error, which will fail if an error was set at entry.