Attempt to modify read-only text bug in pgnus 0.80

Attempt to modify read-only text bug in pgnus 0.80

[Gary Lawrence Murphy]

Hi Lars,

Some time ago someone posted this pgnus 0.80 bug on the ding list and
you had requested they send you a trace.  I've had a similar problem
here where certain email messages will jam the article buffer
preventing the viewing of other articles or even of saving (both O-b
or ^O) the article.

I have narrowed down the cause to have something to do with specific
mail agents, or perhaps it is the mime headers; what I do know is all
my mail from certain addresses trigger this effect reliably and in the
case of the headers listed below, the mail agent appears to be
microsoft's mime/OLE --- one common behaviour with all messages
triggering this effect is the "Drawing /" status message and that
leads me to suspect it is a generic mime problem (or perhaps some
incompatibility with my version of w3.el?)

If there is a work-around, or if there are any additional tests I can
do to help you sort this out, please let me know.

Here's my trace upon trying to read a second article after
viewing an offending article:

Signaling: (error "Attempt to modify read-only text")
  erase-buffer()
  gnus-request-article-this-buffer(5 "nnml:teledynamics.mcp")
  gnus-article-prepare(5 nil)
  gnus-summary-display-article(5)
  gnus-summary-next-page(nil)
* call-interactively(gnus-summary-next-page)

Here's the trace when trying to save a jammed article:

Signaling: (error "Attempt to modify read-only text")
  remove-text-properties(1 2582 (invisible t intangible t))
  article-show-all()
  apply(article-show-all nil)
  (if interactive (call-interactively (quote article-show-all)) (apply (quote article-show-all) args))
  (save-excursion (set-buffer gnus-article-buffer) (if interactive (call-interactively ...) (apply ... args)))
  gnus-article-show-all-headers()
  gnus-summary-select-article(t nil nil 5)
  byte-code("ÁÂÉ\b$‡" [article gnus-summary-select-article t nil] 5)
  gnus-summary-save-article(nil)
  gnus-summary-save-article-body-file(nil)
* call-interactively(gnus-summary-save-article-body-file)
  recursive-edit()
  byte-code("Æ\b!ˆÇ ˆÈÉ!ˆpÊË\x19\x1a^[Ì ˆ+ebˆÍ ˆ`ÎÏ!ˆÐyˆ`|ˆÑ ˆ\f@Ò>ƒL
  debug(error (error "Attempt to modify read-only text"))
  erase-buffer()
  gnus-request-article-this-buffer(5 "nnml:teledynamics.mcp")
  gnus-article-prepare(5 nil)
  gnus-summary-display-article(5)
  gnus-summary-next-page(nil)
* call-interactively(gnus-summary-next-page)

Here are the headers from one of these offending messages:

    X-From-Line: droche@integrityonline32.com  Tue Apr 13 19:42:21 1999
    Received: from hal [207.67.93.89] by mail.integrityonline32.com
      (SMTPD32-5.01) id AE491870210; Tue, 13 Apr 1999 20:40:57 EST
    From: "Don Roche" <droche@integrityonline32.com>
    To: "Gary Lawrence Murphy" <garym@canada.com>
    Subject: Linux System Adminstration
    Date: Tue, 13 Apr 1999 20:49:11 -0500
    X-Gnus-Mail-Source: file:/var/spool/mail/garym
    Message-ID: <LNBBLKNCBJPHCHACFKMHAEMKCBAA.droche@integrityonline32.com>
    MIME-Version: 1.0
    Content-Type: multipart/mixed;
        boundary="----=_NextPart_000_0003_01BE85EF.155AC220"
    X-Priority: 1 (Highest)
    X-MSMail-Priority: High
    X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0)
    Importance: High
    X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2014.211
    X-UIDL: e325e45cc47e24042ec4f8c5a8f5ae97
    Lines: 645
    Xref: maya.dyndns.org teledynamics.mcp:146

    This is a multi-part message in MIME format.

    ------=_NextPart_000_0003_01BE85EF.155AC220
    Content-Type: multipart/alternative;
        boundary="----=_NextPart_001_0004_01BE85EF.155AC220"


    ------=_NextPart_001_0004_01BE85EF.155AC220
    Content-Type: text/plain;
        charset="Windows-1252"
    Content-Transfer-Encoding: 7bit


-- 
 |       _)     Gary Lawrence Murphy <garym@canada.com>
 __|  __| |   \ TeleDynamics Communications Inc 
 |   (    | \_/ http://www.teledyn.com/  ICQ#6023820
\__|\___|_|     Don't oppose forces.  Use them. (RBF)

Re: Attempt to modify read-only text bug in pgnus 0.80

[Kai.Grossjohann]

Gary Lawrence Murphy <garym@canada.com> writes:

  > I have narrowed down the cause to have something to do with specific
  > mail agents, or perhaps it is the mime headers; what I do know is all
  > my mail from certain addresses trigger this effect reliably and in the
  > case of the headers listed below, the mail agent appears to be
  > microsoft's mime/OLE --- one common behaviour with all messages
  > triggering this effect is the "Drawing /" status message and that
  > leads me to suspect it is a generic mime problem (or perhaps some
  > incompatibility with my version of w3.el?)

Hm.  What happens when you do `O b' or `C-o' after having done `C-u g'
on that article first?  Is that an acceptable workaround?

Well, whether it's your w3 version, I don't know.  I've got 4.0pre30,
but then, I don't do `O b' or `C-o'.

kai
-- 
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Re: Attempt to modify read-only text bug in pgnus 0.80

[Gary Lawrence Murphy]

I upgraded to w3 4.0 and now I get the following backtrace when
I try to view one of these html-mime messages:

Signaling: (wrong-type-argument stringp nil)
  string-match("^#" nil)
  font-color-rgb-components(nil)
  w3-display-background-useless-p("#ffffff")
  w3-display-node((*document nil ((html nil ...))))
  w3-draw-tree(((*document nil (...))))
  byte-code("ŠÆÇ!qˆÈ ˆ\bcˆÉp!\x11)\n\v}ˆed|ˆÊ	!ˆË‰‰\x1c\x1d\x1e\x19\x0e\x1aƒI  w3-region(1628 3840)
  byte-code("\bÃ\x19\x1aÄed\"ˆ*Ç" [width url-standalone-mode w3-strict-width t w3-region] 3)
  mm-inline-text((#<buffer  *mm*<2>> ("text/html" (charset . "Windows-1252")) 8bit nil nil nil nil nil))
  mm-display-inline((#<buffer  *mm*<2>> ("text/html" (charset . "Windows-1252")) 8bit nil nil nil nil nil))
  mm-display-part((#<buffer  *mm*<2>> ("text/html" (charset . "Windows-1252")) 8bit nil nil nil nil nil))
  byte-code("Œ\bƒ\x1e  gnus-mime-display-alternative(((#<buffer  *mm*> ("text/plain" ...) 7bit nil nil nil nil nil) (#<buffer  *mm*<2>> ("text/html" ...) 8bit nil nil nil nil nil)) nil nil 1)
  gnus-mime-display-part(("multipart/alternative" (#<buffer  *mm*> ("text/plain" ...) 7bit nil nil nil nil nil) (#<buffer  *mm*<2>> ("text/html" ...) 8bit nil nil nil nil nil)))
  gnus-display-mime()
  gnus-article-prepare-display()
  gnus-article-prepare(5 nil)
  gnus-summary-display-article(5)
  gnus-summary-next-page(nil)
* call-interactively(gnus-summary-next-page)


-- 
 |       _)     Gary Lawrence Murphy <garym@canada.com>
 __|  __| |   \ TeleDynamics Communications Inc 
 |   (    | \_/ http://www.teledyn.com/  ICQ#6023820
\__|\___|_|     Don't oppose forces.  Use them. (RBF)
.

Re: Attempt to modify read-only text bug in pgnus 0.80

[Lars Magne Ingebrigtsen]

Gary Lawrence Murphy <garym@canada.com> writes:

> I have narrowed down the cause to have something to do with specific
> mail agents, or perhaps it is the mime headers; what I do know is all
> my mail from certain addresses trigger this effect reliably and in the
> case of the headers listed below, the mail agent appears to be
> microsoft's mime/OLE --- one common behaviour with all messages
> triggering this effect is the "Drawing /" status message and that
> leads me to suspect it is a generic mime problem (or perhaps some
> incompatibility with my version of w3.el?)

Perhaps your version of w3 is making the buffer read-only?  That would 
be not-nice.

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@gnus.org * Lars Magne Ingebrigtsen