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In applyUpdates-015/016, a invalid name for of node rename is used to trigger err:XUDY0021 (invalid XDM instance created by applying the updates) This does not work, since invalid name is already caught at the level of the rename expression, yielding err:XQDY0074
As applyUpdates-015 is not a test of err:XUDY0021, I'm removing it from the test suite. I've modified applyUpdates-016 so that it should now raise err:XUDY0021. Please close this bug report if you agree with this resolution.