GNU bug report logs - #70076
28.3; xml-escape-string parse issue

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Package: emacs; Reported by: "D. Schmudde" <d@HIDDEN>; Keywords: notabug; Done: Stefan Kangas <stefankangas@HIDDEN>; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Subject: Re: bug#70076: 28.3; xml-escape-string parse issue
To: Eli Zaretskii <eliz@HIDDEN>
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Eli Zaretskii <eliz@HIDDEN> writes:

>> From: "D. Schmudde" <d@HIDDEN>
>> Cc: 70076 <at> debbugs.gnu.org, public@HIDDEN
>> Date: Sun, 31 Mar 2024 13:15:29 +0200
>>
>> Okay, good to know. Thanks for taking a look.
>>
>> Here is some additional context. It occurs when using Elfeed's
>> ~elfeed-export-opml~ on my list of RSS feeds. It seems the library
>> relies on ~xml-escape-string~ to parse each element. It's worth
>> noting that this happens on several feeds, not just the feed for
>> leancrew.com listed below.
>
> OK, but still: how did you get to that point?  Where did the
> problematic string originate from?  Was it something that you typed or
> copy/pasted, or something else?
>
>> I can file a bug with the package maintainers but I wasn't sure if
>> the XML parser was a better place to start.
>
> Yes, I think it is best to start by reporting this to package
> maintainers.

This doesn't seem like a bug in Emacs, and we didn't hear anything in 3
months.  I'm therefore closing this bug.

If this is still an issue, please reply to this email (use "Reply to
all" in your email client) and we can reopen the bug report.
Notification sent to "D. Schmudde" <d@HIDDEN>:
bug acknowledged by developer. Full text available.
Reply sent to Stefan Kangas <stefankangas@HIDDEN>:
You have taken responsibility. Full text available.
Added tag(s) notabug. Request was from Stefan Kangas <stefankangas@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Eli Zaretskii <eliz@HIDDEN>
To: "D. Schmudde" <d@HIDDEN>
In-Reply-To: <87cyraaby6.fsf@HIDDEN>
Subject: Re: bug#70076: 28.3; xml-escape-string parse issue
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> From: "D. Schmudde" <d@HIDDEN>
> Cc: 70076 <at> debbugs.gnu.org, public@HIDDEN
> Date: Sun, 31 Mar 2024 13:15:29 +0200
> 
> Okay, good to know. Thanks for taking a look.
> 
> Here is some additional context. It occurs when using Elfeed's 
> ~elfeed-export-opml~ on my list of RSS feeds. It seems the library 
> relies on ~xml-escape-string~ to parse each element. It's worth 
> noting that this happens on several feeds, not just the feed for 
> leancrew.com listed below.

OK, but still: how did you get to that point?  Where did the
problematic string originate from?  Was it something that you typed or
copy/pasted, or something else?

> I can file a bug with the package maintainers but I wasn't sure if 
> the XML parser was a better place to start.

Yes, I think it is best to start by reporting this to package
maintainers.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#70076; Package emacs. Full text available.

Message received at 70076 <at> debbugs.gnu.org:


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From: "D. Schmudde" <d@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#70076: 28.3; xml-escape-string parse issue
Date: Sun, 31 Mar 2024 13:15:29 +0200
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Okay, good to know. Thanks for taking a look.

Here is some additional context. It occurs when using Elfeed's 
~elfeed-export-opml~ on my list of RSS feeds. It seems the library 
relies on ~xml-escape-string~ to parse each element. It's worth 
noting that this happens on several feeds, not just the feed for 
leancrew.com listed below.

I can file a bug with the package maintainers but I wasn't sure if 
the XML parser was a better place to start. Here is the specific 
backtrace, if it's useful:

Debugger entered--Lisp error: (xml-invalid-character 4194274 11)
  signal(xml-invalid-character (4194274 11))
  xml-escape-string("And now it\342\200\231s all this")
  xml-debug-print-internal((outline ((xmlUrl 
  . "https://leancrew.com/all-this/feed/") (title . "And now 
  it\342\200\231s all this"))) "    ")
  ...

/David

Eli Zaretskii <eliz@HIDDEN> writes:

>> Cc: Protesilaos Stavrou <public@HIDDEN>
>> From: "D. Schmudde" <d@HIDDEN>
>> Date: Fri, 29 Mar 2024 16:44:48 +0100
>>
>> Starting with `emacs -Q`:
>>
>> (require 'xml)
>> (xml-escape-string "And now it\342\200\231s all this")
>>
>> The result is: `xml-escape-string: Invalid XML character: 
>> 4194274,
>> 11`
>>
>> I expect that the string will parse correctly with these escape
>> characters. Or is this expectation wrong?
>
> Your expectation is wrong, AFAIU: you are inserting a unibyte 
> string
> (a string made out of raw bytes) instead of inserting a 
> non-ASCII
> multibyte string, which is what XML expects.
>
> Why did you need to insert those bytes, and where did they come 
> from?


--
w: http://schmud.de
e: d@HIDDEN
t: @dschmudde
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#70076; Package emacs. Full text available.

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Subject: Re: bug#70076: 28.3; xml-escape-string parse issue
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> Cc: Protesilaos Stavrou <public@HIDDEN>
> From: "D. Schmudde" <d@HIDDEN>
> Date: Fri, 29 Mar 2024 16:44:48 +0100
> 
> Starting with `emacs -Q`:
> 
> (require 'xml)
> (xml-escape-string "And now it\342\200\231s all this")
> 
> The result is: `xml-escape-string: Invalid XML character: 4194274, 
> 11`
> 
> I expect that the string will parse correctly with these escape 
> characters. Or is this expectation wrong?

Your expectation is wrong, AFAIU: you are inserting a unibyte string
(a string made out of raw bytes) instead of inserting a non-ASCII
multibyte string, which is what XML expects.

Why did you need to insert those bytes, and where did they come from?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#70076; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


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User-agent: mu4e 1.10.7; emacs 28.3
From: "D. Schmudde" <d@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 28.3; xml-escape-string parse issue
Date: Fri, 29 Mar 2024 16:44:48 +0100
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Starting with `emacs -Q`:

(require 'xml)
(xml-escape-string "And now it\342\200\231s all this")

The result is: `xml-escape-string: Invalid XML character: 4194274, 
11`

I expect that the string will parse correctly with these escape 
characters. Or is this expectation wrong?

In GNU Emacs 28.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.24.33, cairo version 1.16.0)
 of 2023-08-25 built on pop-os
Repository revision: dec958258b133b4c21224c594da433919d852800
Repository branch: emacs-28
System Description: Pop!_OS 22.04 LTS

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ 
JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES 
NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF 
TOOLKIT_SCROLL_BARS
X11 XDBE XIM XPM GTK3 ZLIB
Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix



-- 
w: http://schmud.de
e: d@HIDDEN
t: @dschmudde
Acknowledgement sent to "D. Schmudde" <d@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#70076; Package emacs. Full text available.
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