#480 can't narrow to MIME-encoded subject

[Mike Kupfer]

I recently tried to narrow to a particular subject using "/ s". The following appeared in MH-E Log:

Errors when executing: mark +pending -add -sequence header 0 0
mark: no messages match specification

and no messages appeared in the folder buffer.

The problem appears to be that the subject line was MIME-encoded. The debugger stack looks like this:

Debugger entered--entering a function:

• mh-narrow-to-subject(("-subject" "=?utf-8?Q?Upcoming=20IMC=20Events?="))
  call-interactively(mh-narrow-to-subject nil nil)
  command-execute(mh-narrow-to-subject)

If I edit the message and replace the encoded text with the decoded plaintext, "/ s" works just fine.

[Mike Kupfer]

Forgot to mention:

MH-E 8.6

MH-E compilation details:
Byte compiled: yes
Gnus (compile-time): Gnus v5.13
Gnus (run-time): Gnus v5.13

GNU Emacs 24.3.94.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars)
of 2014-12-08 on allegro

nmh 1.6
mh-progs: /usr/bin/mh
mh-lib: /etc/nmh
mh-lib-progs: /usr/lib/mh

Linux allegro 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt7-1 (2015-03-01) x86_64 GNU/Linux