cmark

diff --git a/test/pathological_tests.py b/test/pathological_tests.py
@@ -6,6 +6,8 @@ import argparse
 import sys
 import platform
 from cmark import CMark
+from multiprocessing import Process, Value
+import time
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description='Run cmark tests.')
@@ -35,6 +37,9 @@ pathological = {
     "many link openers with no closers":
                  (("[a" * 65000),
                   re.compile("(\[a){65000}")),
+    "mismatched openers and closers":
+                 (("*a_ " * 50000),
+                  re.compile("([*]a[_] ){49999}[*]a_")),
     "nested brackets":
                  (("[" * 50000) + "a" + ("]" * 50000),
                   re.compile("\[{50000}a\]{50000}")),
@@ -47,29 +52,38 @@ pathological = {
     }
 
 whitespace_re = re.compile('/s+/')
-passed = 0
-errored = 0
-failed = 0
+passed = Value('i', 0)
+errored = Value('i', 0)
+failed = Value('i', 0)
 
-print("Testing pathological cases:")
-for description in pathological:
-    print(description)
-    (inp, regex) = pathological[description]
+def do_cmark_test(inp, regex, passed, errored, failed):
     [rc, actual, err] = cmark.to_html(inp)
     if rc != 0:
-        errored += 1
-        print(description)
-        print("program returned error code %d" % rc)
+        errored.value += 1
+        print(description, '[ERRORED (return code %d)]' %rc)
         print(err)
     elif regex.search(actual):
-        passed += 1
+        print(description, '[PASSED]')
+        passed.value += 1
     else:
-        print(description, 'failed')
+        print(description, '[FAILED]')
         print(repr(actual))
-        failed += 1
+        failed.value += 1
+
+print("Testing pathological cases:")
+for description in pathological:
+    (inp, regex) = pathological[description]
+    p = Process(target=do_cmark_test, args=(inp, regex, passed, errored, failed))
+    p.start()
+    p.join(1)
+    if p.is_alive():
+        print(description, '[FAILED (timed out)]')
+        p.terminate()
+        p.join()
+        failed.value += 1
 
-print("%d passed, %d failed, %d errored" % (passed, failed, errored))
-if (failed == 0 and errored == 0):
+print("%d passed, %d failed, %d errored" % (passed.value, failed.value, errored.value))
+if (failed.value == 0 and errored.value == 0):
     exit(0)
 else:
     exit(1)