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Add helpful message to assert in mypyc #12119

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Feb 4, 2022
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2 changes: 1 addition & 1 deletion mypyc/irbuild/prepare.py
Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,7 @@ def prepare_method_def(ir: ClassIR, module_name: str, cdef: ClassDef, mapper: Ma
ir.method_decls[PROPSET_PREFIX + node.name] = decl

if node.func.is_property:
assert node.func.type
assert node.func.type, f"Expected return type annotation for property '{node.name}'"
decl.is_prop_getter = True
ir.property_types[node.name] = decl.sig.ret_type

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