Bug#736898: Bug is back

[積丹尼 Dan Jacobson]

OK no more errors seen with
Version: 1.4.625+0.20180518-2
  APT prefers experimental
Versions of packages w3m-el-snapshot depends on:
ii  dpkg               1.19.0.5+b1
ii  emacs              1:25.2+1-7
ii  emacs-gtk [emacs]  1:25.2+1-7
ii  emacsen-common     3.0.0
ii  install-info       6.5.0.dfsg.1-3
ii  w3m                0.5.3-36+b1