[issue4806] Function calls taking a generator as star argument can mask TypeErrors in the generator

[Hagen Fürstenau]

Hagen Fürstenau <hfuerstenau at gmx.net> added the comment:

I'm getting confused about whether it's actually desired behaviour that
generators can be star arguments.

The error message seems to say it's not: "argument after * must be a
sequence". The docs seem to agree: "If the syntax *expression appears in
the function call, expression must evaluate to a sequence." However
test_extcall specifically tests function calls with (non-sequence)
iterables as star arguments.

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