stand-alone info: crashes with /info<RET>

Version:

info (GNU texinfo) 7.3dev (1a108d7c)

Steps to reproduce:

1. invoke info:

env -u INFOPATH info --init-file /dev/null

2. press /info<RET>

Actual behavior:

info crashes:

zsh: segmentation fault (core dumped)  env -u INFOPATH info --init-file
/dev/null

     %

Additional:

This issue seems to be caused by commit 1a108d7c; I tested an earlier
commit, 42afbc78, and it does not have this problem.