Bugzilla #42067:

Fixed a possible StringIndexOutOfBoundsException.
Submitted by: Paul Vinkenoog <paul.at.vinkenoog.nl>

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@540036 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/area/Trait.java

@@ -520,7 +520,8 @@ public class Trait implements Serializable {
            String[] result = {null, null};
            if (attrValue != null) {
               int len = attrValue.length();
-              if (len >= 2 && attrValue.charAt(0) == '(' && attrValue.charAt(len - 1) == ')') {
+              if (len >= 2 && attrValue.charAt(0) == '(' && attrValue.charAt(len - 1) == ')'
+                      && attrValue.indexOf(',') != -1) {
                   String value = attrValue.substring(1, len - 1); // remove brackets
                   int delimIndex = value.indexOf(',');
                   result[0] = value.substring(0, delimIndex).trim(); // PV key