diff -r d84d25d6cdbb -r 3d3dcc3116d5 Target.m
--- a/Target.m	Sat Mar 08 21:04:41 2008 -0800
+++ b/Target.m	Wed Apr 02 14:45:33 2008 -0700
@@ -28,26 +28,30 @@
 
 id $calltarget( NSInvocation *target, id param )
 {
+    id result = nil;
     if( target && target.target ) {
-        [target setArgument: &param atIndex: 2];
-        [target invoke];
-        
-        NSMethodSignature *sig = target.methodSignature;
-        NSUInteger returnLength = sig.methodReturnLength;
-        if( returnLength==0 )
-            return nil; // void
-        else {
-            const char *returnType = sig.methodReturnType;
-            if( returnType[0]=='@' ) {
-                id returnObject;
-                [target getReturnValue: &returnObject];
-                return returnObject;
+        [target retain];
+        @try{
+            [target setArgument: &param atIndex: 2];
+            [target invoke];
+            
+            NSMethodSignature *sig = target.methodSignature;
+            NSUInteger returnLength = sig.methodReturnLength;
+            if( returnLength==0 ) {
+                result = nil; // void
             } else {
-                UInt8 returnBuffer[returnLength];
-                [target getReturnValue: &returnBuffer];
-                return [NSValue valueWithBytes: &returnBuffer objCType: returnType];
+                const char *returnType = sig.methodReturnType;
+                if( returnType[0]=='@' ) {
+                    [target getReturnValue: &result];
+                } else {
+                    UInt8 returnBuffer[returnLength];
+                    [target getReturnValue: &returnBuffer];
+                    result = [NSValue valueWithBytes: &returnBuffer objCType: returnType];
+                }
             }
+        }@finally{
+            [target release];
         }
-    } else
-        return nil;
+    }
+    return result;
 }