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Prevent crash during debugging when attempting to inspect PyObject#1483
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What does this implement/fix? Explain your changes.
When debugging code, that uses
PyObjectinstances, debugger would try to executePyObject.ToStringto showPyObjectvalues in watches window. That call causesAccessViolationExceptionwhen the current thread does not hold global interpreter lock.This change adds
DebuggerDisplayattribute toPyObject, that makes debugger first check if GIL is held by the current thread, and only useToStringwhen it does. Otherwise, a message with object handle and a suggestion to acquire GIL is displayed.