Request for comment on failing theory datapoint changes

We're currently looking at making some changes to how theory
datapoint-generating methods fail. Currently datapoint methods that throw
exceptions are simply ignored: this means that theories with two valid
sources for a parameter quietly pass even if one of those sources is
failing and never producing values to test.

There's an open pull request to fix this (
https://github.com/junit-team/junit/pull/639), making those datapoint
methods fail instead, but there's concern that this can break tests that
currently pass, or that people might even actually be depending on this
functionality.

Does anybody have any strong feelings either way on this? I'm particularly
interested from anybody who does depend on the current functionality, or
anybody who can think of any reasonable scenarios where you might prefer
this behaviour.


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