Clean up merge of r75400.

Lib/test/regrtest.py

@@ -337,7 +337,7 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
             try:
                 result = runtest(*args, **kwargs)
             except BaseException as e:
-                result = -3, e.__class__.__name__
+                result = -4, e.__class__.__name__
             sys.stdout.flush()
             print()   # Force a newline (just in case)
             print(json.dumps(result))
@@ -496,7 +496,7 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
             if test is None:
                 finished += 1
                 continue
-            if result[0] == -3:
+            if result[0] == -4:
                 assert result[1] == 'KeyboardInterrupt'
                 pending.clear()
                 raise KeyboardInterrupt   # What else?
@@ -804,12 +804,6 @@ def runtest_inner(test, verbose, quiet,
 
     test_time = 0.0
     refleak = False  # True if the test leaked references.
-    try:
-        save_stdout = sys.stdout
-        # Save various things that tests may mess up so we can restore
-        # them afterward.
-        save_environ = dict(os.environ)
-        save_argv = sys.argv[:]
     try:
         if test.startswith('test.'):
             abstest = test
@@ -830,19 +824,6 @@ def runtest_inner(test, verbose, quiet,
                 refleak = dash_R(the_module, test, indirect_test,
                     huntrleaks)
             test_time = time.time() - start_time
-        finally:
-            sys.stdout = save_stdout
-            # Restore what we saved if needed, but also complain if the test
-            # changed it so that the test may eventually get fixed.
-            if not os.environ == save_environ:
-                if not quiet:
-                    print("Warning: os.environ was modified by", test)
-                os.environ.clear()
-                os.environ.update(save_environ)
-            if not sys.argv == save_argv:
-                if not quiet:
-                    print("Warning: argv was modified by", test)
-                sys.argv[:] = save_argv
     except support.ResourceDenied as msg:
         if not quiet:
             print(test, "skipped --", msg)

Misc/NEWS

@@ -289,8 +289,9 @@ Tests
 - Issue #7055: test___all__ now greedily detects all modules which have an
   __all__ attribute, rather than using a hardcoded and incomplete list.
 
-- Issue #7058: Added save/restore for argv and os.environ to runtest_inner
-  in regrtest, with warnings if the called test modifies them.
+- Issue #7058: Added save/restore for things like sys.argv and cwd to
+  runtest_inner in regrtest, with warnings if the called test modifies them,
+  and a new section in the summary report at the end.
 
 - Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.