Subject: reftex: Highlight all missing references/citations

From: Hong Xu <[email-masked]>
Date: Tue, 06 Dec 2016 22:06:48 -0800

It would be a nice feature if reftex can highlight all missing
references/citations in the buffer. For example, references/citations
such as \ref{nonexistence} or \cite{nonexistence} point to nonexistent
entries, which should be highlighted as errors.