ignore harmless exceptions I can't fix

fyi, it's really hard to test this fix because the exception is not generally reproducable

2 files changed, 30 insertions, 3 deletions

diff --git a/src/cuchaz/enigma/ExceptionIgnorer.java b/src/cuchaz/enigma/ExceptionIgnorer.java
new file mode 100644
index 00000000..37c67da7
--- /dev/null
+++ b/src/cuchaz/enigma/ExceptionIgnorer.java
@@ -0,0 +1,24 @@
+package cuchaz.enigma;
+
+public class ExceptionIgnorer {
+
+        public static boolean shouldIgnore(Throwable t) {
+                
+                // is this that pesky concurrent access bug in the highlight painter system?
+                // (ancient ui code is ancient)
+                if (t instanceof ArrayIndexOutOfBoundsException) {
+                        StackTraceElement[] stackTrace = t.getStackTrace();
+                        if (stackTrace.length > 1) {
+                        
+                                // does this stack frame match javax.swing.text.DefaultHighlighter.paint() ?
+                                StackTraceElement frame = stackTrace[1];
+                                if (frame.getClassName().equals("javax.swing.text.DefaultHighlighter") && frame.getMethodName().equals("paint")) {
+                                        return true;
+                                }
+                        }
+                }
+                
+                return false;
+        }
+        
+}
diff --git a/src/cuchaz/enigma/gui/Gui.java b/src/cuchaz/enigma/gui/Gui.java
index 187ef5b5..00cff595 100644
--- a/src/cuchaz/enigma/gui/Gui.java
+++ b/src/cuchaz/enigma/gui/Gui.java
@@ -70,6 +70,7 @@ import jsyntaxpane.DefaultSyntaxKit;
 import com.google.common.collect.Lists;
 
 import cuchaz.enigma.Constants;
+import cuchaz.enigma.ExceptionIgnorer;
 import cuchaz.enigma.analysis.BehaviorReferenceTreeNode;
 import cuchaz.enigma.analysis.ClassImplementationsTreeNode;
 import cuchaz.enigma.analysis.ClassInheritanceTreeNode;
@@ -147,9 +148,11 @@ public class Gui {
                         CrashDialog.init(m_frame);
                         Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {
                                 @Override
-                                public void uncaughtException(Thread thread, Throwable ex) {
-                                        ex.printStackTrace(System.err);
-                                        CrashDialog.show(ex);
+                                public void uncaughtException(Thread thread, Throwable t) {
+                                        t.printStackTrace(System.err);
+                                        if (!ExceptionIgnorer.shouldIgnore(t)) {
+                                                CrashDialog.show(t);
+                                        }
                                 }
                         });
                 }