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GeezerVison is showing github.com — Incorrect warning when assign an unsigned integer member · Issue #114388 · python/cpython Closed Labels 3.11only security fixesonly security fixes3.12only security fixesonly security fixes3.13only security fixesonly security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs) DescriptionAssigning a negative value to an unsigned integer member can emit a RuntimeWarning. $ ./python -Wa >>> import _testcapi >>> ts = _testcapi._test_structmembersType_NewAPI() >>> ts.T_UBYTE = -42 <stdin>:1: RuntimeWarning: Truncation of value to unsigned char >>> ts.T_USHORT = -42 <stdin>:1: RuntimeWarning: Truncation of value to unsigned short >>> ts.T_UINT = -42 <stdin>:1: RuntimeWarning: Writing negative value into unsigned field <stdin>:1: RuntimeWarning: Truncation of value to unsigned int >>> ts.T_ULONG = -42 <stdin>:1: RuntimeWarning: Writing negative value into unsigned field (And for T_ULONGLONG it raises an OverflowError, but this is perhaps another issue). The first issue is that it emits two warnings for T_UINT. It is also weird that warnings are different. The second issue is that if the value is not an int subclass, it emits a warning also for positive values for T_UINT and T_ULONG: >>> class Index: ... def __init__(self, value): ... self.value = value ... def __index__(self): ... return self.value ... >>> ts.T_UBYTE = Index(42) >>> ts.T_USHORT = Index(42) >>> ts.T_UINT = Index(42) <stdin>:1: RuntimeWarning: Writing negative value into unsigned field >>> ts.T_ULONG = Index(42) <stdin>:1: RuntimeWarning: Writing negative value into unsigned field (No warning is emitted for assigning a negative index to T_ULONGLONG, but this is perhaps another issue). Linked PRsActivity
MetadataMetadataAssigneesLabels3.11only security fixesonly security fixes3.12only security fixesonly security fixes3.13only security fixesonly security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs) ProjectsMilestoneRelationshipsDevelopmentIssue actions |
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