Fix segfaults resulting from incorrect memory management.

fix-segfaults.patch

@@ -0,0 +1,48 @@
+diff --git a/itstool.in b/itstool.in
+index c1d0585..a16eba9 100755
+--- a/itstool.in
++++ b/itstool.in
+@@ -477,6 +477,7 @@ class Document (object):
+         if load_dtd:
+             ctxt.loadSubset(1)
+         if keep_entities:
++            ctxt.loadSubset(1)
+             ctxt.ctxtUseOptions(libxml2.XML_PARSE_DTDLOAD)
+             ctxt.replaceEntities(0)
+         else:
+@@ -1043,6 +1044,7 @@ class Document (object):
+         if self._load_dtd:
+             ctxt.loadSubset(1)
+         if self._keep_entities:
++            ctxt.loadSubset(1)
+             ctxt.ctxtUseOptions(libxml2.XML_PARSE_DTDLOAD)
+             ctxt.replaceEntities(0)
+         else:
+@@ -1069,7 +1071,9 @@ class Document (object):
+                     ph_node = msg.get_placeholder(child.name).node
+                     if self.has_child_elements(ph_node):
+                         self.merge_translations(translations, None, ph_node, strict=strict)
+-                        child.replaceNode(ph_node)
++                        newnode = ph_node.copyNode(1)
++                        newnode.setTreeDoc(self._doc)
++                        child.replaceNode(newnode)
+                     else:
+                         repl = self.get_translated(ph_node, translations, strict=strict, lang=lang)
+                         child.replaceNode(repl)
+@@ -1084,10 +1088,15 @@ class Document (object):
+                     (lang + ' ') if lang is not None else '',
+                     msgstr.encode('utf-8')))
+                 self._xml_err = ''
++                ctxt.doc().freeDoc()
+                 return node
+         retnode = node.copyNode(2)
++        retnode.setTreeDoc(self._doc)
+         for child in xml_child_iter(trnode):
+-            retnode.addChild(child.copyNode(1))
++            newnode = child.copyNode(1)
++            newnode.setTreeDoc(self._doc)
++            retnode.addChild(newnode)
++
+         ctxt.doc().freeDoc()
+         return retnode
+ 

itstool.spec

@@ -1,11 +1,15 @@
 Name:           itstool
 Version:        2.0.4
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        ITS-based XML translation tool
 
 License:        GPLv3+
 URL:            http://itstool.org/
 Source0:        http://files.itstool.org/itstool/%{name}-%{version}.tar.bz2
+# An issue with libxml2 is causing segfaults for packages using
+# itstool. Backported the workaround from upstream.
+# https://github.com/itstool/itstool/commit/9b84c007a73e8275ca45762f1bfa3ab7c3a852e2
+Patch0:         fix-segfaults.patch
 
 BuildArch:      noarch
 
@@ -20,6 +24,7 @@ how to separate it into PO file messages.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 export PYTHON=%{__python3}
@@ -37,6 +42,9 @@ make install DESTDIR=$RPM_BUILD_ROOT
 %doc %{_mandir}/man1/itstool.1.gz
 
 %changelog
+* Mon Jul 16 2018 Charalampos Stratakis <cstratak@redhat.com> - 2.0.4-4
+- Fix libxml2 related segfaults
+
 * Mon Jul 16 2018 Miro Hrončok <mhroncok@redhat.com> - 2.0.4-3
 - Switch to Python 3