--- a/hgext/convert/subversion.py	Mon Jan 21 17:37:33 2019 +0000
+++ b/hgext/convert/subversion.py	Thu Feb 07 18:57:54 2019 +0300
@@ -1324,8 +1324,8 @@
             try:
                 rev = self.commit_re.search(output).group(1)
             except AttributeError:
-                if parents and not files:
-                    return parents[0]
+                if not files:
+                    return parents[0] if parents else None
                 self.ui.warn(_('unexpected svn output:\n'))
                 self.ui.warn(output)
                 raise error.Abort(_('unable to cope with svn output'))