Description:
I'm having issues searching through my LaTeX documents. I narrowed it down to \usepackage[T1]{fontenc} and \usepackage{lmodern}. With those removed / commented searching works again.

Here's a minimal example: http://ix.io/2gIn/TeX

Building the pdf with pdflatex file.tex I can search through the pdf file. If I uncomment and include either the fontenc or the lmodern or both, searching doesn't work anymore.

It's not a LaTeX / TexLive issue, because I tried searching through older documents, which I'm sure I was able to search in. Doesn't work anymore. And with e.g. Evince there's no problem at all.

Additional info:
* package version(s)
$ pacman -Qi mupdf | grep Version
Version : 1.16.1-3

* config and/or log files etc.
none of the two packages included: http://ix.io/2gIp
fontenc included: http://ix.io/2gIq
lmodern included: http://ix.io/2gIr
both packages included: http://ix.io/2gIs

* link to upstream bug report, if any
none to be found

Steps to reproduce:
Save the minimal example with e.g. filename test.tex, then run "pdflatex test.tex", then open the resulting pdf file in mupdf and search for e.g. "Lorem". It will be found. Now include one of the packages or both by uncommenting the corresponding commented lines, run "pdflatex test.tex" again, open the pdf file in mupdf and search for e.g. "Lorem". It will NOT be found. In fact nothing will be found.