[issue43874] argparse crashes on subparsers with no dest/metava

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Terence, a 'crash' for this tracker is a core dump or equivalent with no exception/traceback.

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nosy: +terry.reedy
stage:  -> patch review
type: crash -> behavior
versions:  -Python 3.6, Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43874>
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