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bug#20825: 25.0.50; Cannot view info docs anymore (100% CPU)
From: |
Robert Pluim |
Subject: |
bug#20825: 25.0.50; Cannot view info docs anymore (100% CPU) |
Date: |
Tue, 16 Jun 2015 14:18:33 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
Tassilo Horn <tsdh@gnu.org> writes:
> With emacs HEAD e80225000dda3f1deac5ea95a9253301b05fbed7, emacs starts
> using up 100% CPU time when trying to view some info documentation.
>
> 1. emacs -Q
> 2. C-h i
> The info index is shown properly
> 3. m emacs RET
>
I see this as well.
> Now emacs starts using up 100% CPU, and the emacs info docs aren't
> shown. With `debug-on-quit' I obtain the following backtrace during the
> hang.
>
> Debugger entered--Lisp error: (quit)
> count-lines(1 1)
> line-number-at-pos(70)
> filepos-to-bufferpos(1116 approximate)
> Info-find-node-2("/home/horn/Repos/el/emacs/info/emacs" "Top" nil nil)
> Info-find-node("emacs" "Top" nil nil)
> Info-goto-node("(emacs)" nil)
> Info-menu("Emacs" nil)
> funcall-interactively(Info-menu "Emacs" nil)
> call-interactively(Info-menu nil nil)
> command-execute(Info-menu)
>
Not unsurprisingly, git bisect points at this commit as the culprit:
commit b95f53f0383b5df82e0b711f5027881950893f4f
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Date: Mon Jun 15 18:48:08 2015 -0400
* lisp/info.el: Cleanup bytepos/charpos issues
* lisp/international/mule-util.el: Use lexical-binding.
(filepos-to-bufferpos): New function.
* lisp/info.el (Info-find-in-tag-table-1): Use 0-based file positions.
(Info-find-node-2): Use filepos-to-bufferpos (bug#20704).
(Info-read-subfile, Info-search): Use 0-based file positions.
and updating to the commit just before makes the issue go away.
Robert