Change Details

Steps to reproduce: 1. Create an article with the following content (https://de.wikipedia.beta.wmflabs.org/w/index.php?title=VE-Ref-Test&oldid=22274): ``` a<ref name="foo"/> <references> <ref name="foo">Foo</ref> </references> ``` 2. Edit in VE, and remove the reference, and add a different one instead (https://de.wikipedia.beta.wmflabs.org/w/index.php?title=VE-Ref-Test&diff=22275&oldid=22274). Expected: The named reference should be deleted. Actual: The named reference, now unused, is kept and causes an error that wasn't visible while editing (https://de.wikipedia.beta.wmflabs.org/w/index.php?title=VE-Ref-Test&oldid=22275).

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