[xml/sgml-pkgs] Bug#1035554: libxml2-utils: xmllint ignores --output option and writes to stdout

Fri May 5 11:51:05 BST 2023

Package: libxml2-utils
Version: 2.9.10+dfsg-6.7+deb11u4
Severity: normal
Tags: upstream

xmllint is ignoring --output FILE option. I've done a debug run with gdb and it correctly reads the option and assigns its value to the 'output' variable but doesn't read that variable before writing the output. Confirmed with gdb's hardware watch `awatch output`. The final trace before the output is written to stdout is:

3701                if (repeat) {                                                                                                                                          
(gdb) n                                                                                                                                                                    
3724                    nbregister = 0;                                                                                                                                    
(gdb) n                                                                                                                                                                    
3727                    if (stream != 0)                                                                                                                                   
(gdb) n                                                                                                                                                                    
3731                    if (sax) {                                                                                                                                         
(gdb) n                                                                                                                                                                    
3734                        parseAndPrintFile(argv[i], NULL);

$ xmllint --output test.txt --html --xpath '//div[contains(@class, '\''test'\'')]/div/ul/li/a/@href' xmllint-test.html 
 href="test0.html"
 href="test1.html"
 href="test2.html"
 href="test3.html"
 href="test4.html"
 href="test5.html"
 href="test6.html"
 href="test7.html"
 href="test8.html"
 href="test9.html"

$ cat xmllint-test.html 
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>xmllint test --output</title>
 </head>
 <body>
  <h1>xmllint test --output</h1>
  <div class="test">
   <div>
    <ul>
     <li><a href="test0.html">test0</a></li>
     <li><a href="test1.html">test1</a></li>
     <li><a href="test2.html">test2</a></li>
     <li><a href="test3.html">test3</a></li>
     <li><a href="test4.html">test4</a></li>
     <li><a href="test5.html">test5</a></li>
     <li><a href="test6.html">test6</a></li>
     <li><a href="test7.html">test7</a></li>
     <li><a href="test8.html">test8</a></li>
     <li><a href="test9.html">test9</a></li>
    </ul>
   </div>
  </div>
 </body>
</html>

-- System Information:
Debian Release: 11.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Versions of packages libxml2-utils depends on:
ii  libc6    2.31-13+deb11u6
ii  libxml2  2.9.10+dfsg-6.7+deb11u4

libxml2-utils recommends no packages.

libxml2-utils suggests no packages.