26 lines
671 B
Python
26 lines
671 B
Python
# Test that we can raise and catch (preallocated) exception
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# without memory allocation.
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import micropython
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e = ValueError("error")
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def func():
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micropython.heap_lock()
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try:
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# This works as is because traceback is not allocated
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# if not possible (heap is locked, no memory). If heap
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# is not locked, this would allocate a traceback entry.
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# To avoid that, traceback should be warmed up (by raising
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# it once after creation) and then cleared before each
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# raise with:
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# e.__traceback__ = None
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raise e
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except Exception as e2:
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print(e2)
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micropython.heap_unlock()
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func()
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print("ok")
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