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mirror of https://gitlab.gnome.org/GNOME/libxml2.git synced 2025-03-11 12:58:16 +03:00
Dennis Filder 7e9bbdf82f parser bug on misformed namespace attributes
For https://bugzilla.gnome.org/show_bug.cgi?id=672539
Reported by Axel Miller <axel.miller@ppi.de>

Consider the following start-tag:
<x xmlns=""version="">

The start-tag does not conform to the rule

[40]       STag       ::=       '<' Name (S Attribute)* S? '>'

since there is no whitespace in front of the attribute "version".

Thus, libxml2 should reject the start-tag.
But it doesn't:

$ echo '<x xmlns=""version=""/>' | xmllint -
<?xml version="1.0"?>
<x xmlns="" version=""/>

The error seems to happen only if there is a namespace declaration in
front of
the attribute. A missing whitespace between other attributes is handled
correctly:

$ echo '<x someattr=""version=""/>' | xmllint -
-:1: parser error : attributes construct error
<x someattr=""version=""/>
              ^
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                  XML toolkit from the GNOME project

Full documentation is available on-line at
    http://xmlsoft.org/

This code is released under the MIT Licence see the Copyright file.

To build on an Unixised setup:
   ./configure ; make ; make install
To build on Windows:
   see instructions on win32/Readme.txt

To assert build quality:
   on an Unixised setup:
      run make tests
   otherwise:
       There is 3 standalone tools runtest.c runsuite.c testapi.c, which
       should compile as part of the build or as any application would.
       Launch them from this directory to get results, runtest checks 
       the proper functionning of libxml2 main APIs while testapi does
       a full coverage check. Report failures to the list.

To report bugs, follow the instructions at: 
  http://xmlsoft.org/bugs.html

A mailing-list xml@gnome.org is available, to subscribe:
    http://mail.gnome.org/mailman/listinfo/xml

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Daniel Veillard

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