[Bug-AUCTeX] 2013-05-23; TeX-next-error does not update help buffer

[Markus Pahlow]

Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.

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a bug report.  In addition check if the bug is reproducable with an
up-to-date version of AUCTeX.  So please upgrade to the version
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------------------------------------------------------------------------

I use the auctex version retrieved via git.  When I use TeX-next-error
the first time, it works.  However, the next time TeX-next-error is
used, the help buffer displays the previous error and help messages.
Deleting the help buffer makes TeX-next-error work (only once).
I found that the following modification of TeX-help-error in tex-buf.el solved
the problem:
add the command (setq buffer-read-only nil) before (erase-buffer) on line 1756
in tex-buf.el.
I hope this is helpful.

Markus

Emacs  : GNU Emacs 24.3.7 (x86_64-apple-darwin12.3.0, NS apple-appkit-1187.37)
 of 2013-06-07 on hui.local
Package: 2013-05-23

current state:
==============
(setq
 AUCTeX-date "2013-05-23"
 window-system 'ns
 LaTeX-version "2e"
 TeX-style-path '("/usr/local/var/auctex" 
"/usr/local/share/emacs/site-lisp/auctex/style"
                  "auto" "style")
 TeX-auto-save t
 TeX-parse-self t
 TeX-master t
 TeX-command-list '(("TeX" "%(PDF)%(tex) %`%S%(PDFout)%(mode)%' %t" TeX-run-TeX 
nil (plain-tex-mode texinfo-mode ams-tex-mode)
                     :help "Run plain TeX")
                    ("LaTeX" "%`%l%(mode)%' %t" TeX-run-TeX nil (latex-mode 
doctex-mode) :help "Run LaTeX")
                    ("LatexMk" "latexmk -pdflatex=lualatex -pdf %t" 
TeX-run-latexmk nil (plain-tex-mode latex-mode doctex-mode)
                     :help "Run LatexMk")
                    ("Handout"
                     "%`%l%(mode) --jobname %s_handout 
\\\\\\\"\\\\\\\\PassOptionsToClass{handout}{beamer}\\\\\\\"%' %t"
                     TeX-run-TeX nil (latex-mode) :help "Produce beamer 
handout")
                    ("Makeinfo" "makeinfo %t" TeX-run-compile nil 
(texinfo-mode) :help "Run Makeinfo with Info output")
                    ("Makeinfo HTML" "makeinfo --html %t" TeX-run-compile nil 
(texinfo-mode) :help
                     "Run Makeinfo with HTML output")
                    ("AmSTeX" "%(PDF)amstex %`%S%(PDFout)%(mode)%' %t" 
TeX-run-TeX nil (ams-tex-mode) :help "Run AMSTeX")
                    ("ConTeXt" "texexec --once --texutil %(execopts)%t" 
TeX-run-TeX nil (context-mode) :help "Run ConTeXt once")
                    ("ConTeXt Full" "texexec %(execopts)%t" TeX-run-TeX nil 
(context-mode) :help "Run ConTeXt until completion")
                    ("BibTeX" "bibtex %s" TeX-run-BibTeX nil t :help "Run 
BibTeX")
                    ("Biber" "biber %s" TeX-run-Biber nil t :help "Run Biber")
                    ("View" "%V" TeX-run-discard-or-function nil t :help "Run 
Viewer")
                    ("Print" "%p" TeX-run-command t t :help "Print the file")
                    ("Queue" "%q" TeX-run-background nil t :help "View the 
printer queue" :visible TeX-queue-command)
                    ("File" "%(o?)dvips %d -o %f " TeX-run-command t t :help 
"Generate PostScript file")
                    ("Index" "makeindex %s" TeX-run-command nil t :help "Create 
index file")
                    ("Xindy" "texindy %s" TeX-run-command nil t :help "Run 
xindy to create index file")
                    ("Check" "lacheck %s" TeX-run-compile nil (latex-mode) 
:help "Check LaTeX file for correctness")
                    ("ChkTeX" "chktex -v6 %s" TeX-run-compile nil (latex-mode) 
:help "Check LaTeX file for common mistakes")
                    ("Spell" "(TeX-ispell-document \"\")" TeX-run-function nil 
t :help "Spell-check the document")
                    ("Clean" "TeX-clean" TeX-run-function nil t :help "Delete 
generated intermediate files")
                    ("Clean All" "(TeX-clean t)" TeX-run-function nil t :help 
"Delete generated intermediate and output files")
                    ("Other" "" TeX-run-command t t :help "Run an arbitrary 
command"))
 )