diff --git a/projects/Lang/9/org/apache/commons/lang3/time/FastDateParser.java b/projects/Lang/9/org/apache/commons/lang3/time/FastDateParser.java
index 8df302f..38857c7 100644
--- a/projects/Lang/9/org/apache/commons/lang3/time/FastDateParser.java
+++ b/projects/Lang/9/org/apache/commons/lang3/time/FastDateParser.java
@@ -141,6 +141,9 @@ private void init() {
             currentFormatField= nextFormatField;
             currentStrategy= nextStrategy;
         }
+        if (patternMatcher.regionStart() != patternMatcher.regionEnd()) {
+            throw new IllegalArgumentException("Failed to parse \""+pattern+"\" ; gave up at index "+patternMatcher.regionStart());
+        }
         if(currentStrategy.addRegex(this, regex)) {
             collector.add(currentStrategy);
         }