1 files changed, 9 insertions, 1 deletions
diff --git a/examples/simpleArith.py b/examples/simpleArith.py
index af3f904..4539018 100644
--- a/examples/simpleArith.py
+++ b/examples/simpleArith.py
@@ -6,9 +6,12 @@
 #
 # Copyright 2006, by Paul McGuire
 #
-
+import sys
 from pyparsing import *
 
+ParserElement.enablePackrat()
+sys.setrecursionlimit(3000)
+
 integer = Word(nums).setParseAction(lambda t: int(t[0]))
 variable = Word(alphas, exact=1)
 operand = integer | variable
@@ -64,6 +67,11 @@ test = [
     "M*X + B",
     "M*(X + B)",
     "1+2*-3^4*5+-+-6",
+    "(a + b)",
+    "((a + b))",
+    "(((a + b)))",
+    "((((a + b))))",
+    "((((((((((((((a + b))))))))))))))",
 ]
 for t in test:
     print(t)