[mypyc] Use method_sig to get the method signature#21567
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rheard
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method_sig to get the method signaturemethod_sig to get the method signature
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looks good, thank you!
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Fixes #21566
create_ne_from_eq()checks whether the class has an__eq__method usingcls.has_method("__eq__"), butgen_glue_ne_method()then requirescls.get_method("__eq__")to return a concreteFuncIR.In this package-cycle case, the inherited method declaration exists, but the concrete
FuncIRbody is not available yet. This makescls.has_method("__eq__")true whilecls.get_method("__eq__")returns None.