[issue28257] Regression for star argument parameter error messages

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Ned and Larry.

Is it allowed to use the patch from issue27358 for fixing a regression in 3.6 and inconsistency in 3.5 for var-keyword arguments? The patch introduces new private function _PyDict_MergeEx() and touches the implementation of PyDict_Merge(). Maybe this can be fixed with smaller patch, but I don't know.

Is it allowed to add new opcode BUILD_TUPLE_UNPACK_WITH_CALL for fixing a regression in 3.6 and inconsistency in 3.5 for var-positional arguments? This is the only way. The bytecode already was changed in a bugfix release of 3.5 for more serious need: fixing potential segfault or security issue (issue27286).

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priority: normal -> deferred blocker

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28257>
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