Merge pull request #964 from lmr/fix_test_interrupt_bug

selftests/test_interrupt.py: Handle timing problems

selftests/functional/test_interrupt.py

@@ -152,12 +152,18 @@ class InterruptTest(unittest.TestCase):
                 except psutil.NoSuchProcess:
                     pass
                 if p_obj is not None:
-                    if old_psutil:
-                        cmdline_list = psutil.Process(p).cmdline
-                    else:
-                        cmdline_list = psutil.Process(p).cmdline()
-                    if good_test.path in " ".join(cmdline_list):
-                        good_test_processes.append(p_obj)
+                    try:
+                        if old_psutil:
+                            cmdline_list = psutil.Process(p).cmdline
+                        else:
+                            cmdline_list = psutil.Process(p).cmdline()
+                        if good_test.path in " ".join(cmdline_list):
+                            good_test_processes.append(p_obj)
+                    # psutil.NoSuchProcess happens when the original
+                    # process already ended and left the process table
+                    except psutil.NoSuchProcess:
+                        pass
+
             return len(good_test_processes) == 0
 
         wait.wait_for(wait_until_no_goodtest, timeout=2)