[issue30978] str.format_map() silences exceptions in __getitem__

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset f08b2be4416163e3d18b8d09891e7cda0d8a21d4 by Serhiy Storchaka in branch '3.6':
[3.6] bpo-30978: str.format_map() now passes key lookup exceptions through. (GH-2790) (#2992)
https://github.com/python/cpython/commit/f08b2be4416163e3d18b8d09891e7cda0d8a21d4


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<http://bugs.python.org/issue30978>
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