Functions must define call #14228
Labels
area-test
Cross-cutting test issues (use area- labels for specific failures; not used for package:test).
closed-obsolete
Closed as the reported issue is no longer relevant
type-bug
Incorrect behavior (everything from a crash to more subtle misbehavior)
The test language/black_listed_test/none defines two concrete subclasses of function that do not define concrete implementation of the call method. According to section 15.5 of the specification:
It is a static warning if a concrete class implements Function and does not have a concrete method named call().
but the test does not expect any warnings.
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