[issue44368] Invalid mapping patterns give confusing SyntaxErrors

[Brandt Bucher]

Brandt Bucher <brandtbucher at gmail.com> added the comment:

I found a similar one, by the way (not related to mapping patterns):

match ...:
    case 42 as _:
        pass

  File "<stdin>", line 2
    case 42 as _:
               ^
SyntaxError: expected ':'

Is this covered by your fix?

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