# [texhax] \protect in LaTeX2e

Robert Hunt R.E.Hunt at damtp.cam.ac.uk
Fri Oct 1 18:51:03 CEST 2004

```In section 2.6 of Kopka & Daly's book, they state that "The issue of
fragile commands ... with LaTeX2e has become of academic interest: all
commands that are likely to be used in moving arguments are now robust." I
recently discovered that this isn't true: \nolinebreak is not robust and

\caption{Blah blah ... blah\nolinebreak\ blah blah blah}

fails rather dismally. This can of course be avoided with \protect, but