Stop printing full backtrace when light data lambda fails

Since this occurs naturally for 2 blocks, the backtrace is just noise.

burger/toppings/blocks.py

@@ -27,7 +27,6 @@
 from jawa.util.descriptor import method_descriptor
 
 from burger.util import WalkerCallback, walk_method, try_eval_lambda
-import traceback
 
 import six.moves
 
@@ -268,10 +267,9 @@ def on_invokedynamic(self, ins, const, args):
                     try:
                         args.append(object()) # The state that the lambda gets
                         return try_eval_lambda(ins, args, lcf)
-                    except:
+                    except Exception as ex:
                         if verbose:
-                            print("Failed to call lambda")
-                            traceback.print_exc()
+                            print("Failed to call lambda for light data:", ex)
                         return None
                 else:
                     return object()