https://github.com/cmusphinx/sphinxbase/commit/6989c52a3fb9473fd61326e548440fff887525c2

commit 6989c52a3fb9473fd61326e548440fff887525c2
Author: Michel Zou <xantares09@hotmail.com>
Date:   Thu Feb 6 07:02:06 2020 +0100

    Fix doxy2swig.py IndexError: list index out of range

diff --git a/doc/doxy2swig.py b/doc/doxy2swig.py
index 5589b0d..a01c4b1 100644
--- a/doc/doxy2swig.py
+++ b/doc/doxy2swig.py
@@ -299,7 +299,10 @@ class Doxy2SWIG:
             name = first['name'].firstChild.data
 
             for n in node.getElementsByTagName('param'):
-              arg_type = n.getElementsByTagName('type')[0]
+              elts = n.getElementsByTagName('type')
+              if len(elts) == 0:
+                  continue
+              arg_type = elts[0]
               ref = self.get_specific_nodes(arg_type, ('ref'))
               if 'ref' in ref:
                 type_name = ref['ref'].firstChild.data
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<tr><td><span title='2023-08-16 11:24:10 -0400'>2023-08-16</span></td><td><a href='/guix/commit/gnu/tests/desktop.scm?id=132ddca5a4fb6d789f98866b5bf85be95306c969'>gnu: elogind: Update to 252.9.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-05-14 23:14:25 +0200'>2023-05-14</span></td><td><a href='/guix/commit/gnu/tests/desktop.scm?id=150367c84da8766dc0358ff4878b9e17dbea6a40'>tests: elogind: Wait until 'elogind' is up.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>