Issue #29392: Prevent crash when passing invalid arguments into msvcrt module.

1 files changed, 18 insertions, 14 deletions

diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 301c142d75..7f7e6dafcf 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -35,14 +35,6 @@ SyntaxError: invalid syntax
 Traceback (most recent call last):
 SyntaxError: can't assign to keyword
 
-It's a syntax error to assign to the empty tuple.  Why isn't it an
-error to assign to the empty list?  It will always raise some error at
-runtime.
-
->>> () = 1
-Traceback (most recent call last):
-SyntaxError: can't assign to ()
-
 >>> f() = 1
 Traceback (most recent call last):
 SyntaxError: can't assign to function call
@@ -374,7 +366,23 @@ build.  The number of blocks must be greater than CO_MAXBLOCKS.  SF #1565514
      ...
    SyntaxError: too many statically nested blocks
 
-Misuse of the nonlocal statement can lead to a few unique syntax errors.
+Misuse of the nonlocal and global statement can lead to a few unique syntax errors.
+
+   >>> def f():
+   ...     x = 1
+   ...     global x
+   Traceback (most recent call last):
+     ...
+   SyntaxError: name 'x' is assigned to before global declaration
+
+   >>> def f():
+   ...     x = 1
+   ...     def g():
+   ...         print(x)
+   ...         nonlocal x
+   Traceback (most recent call last):
+     ...
+   SyntaxError: name 'x' is used prior to nonlocal declaration
 
    >>> def f(x):
    ...     nonlocal x
@@ -493,10 +501,6 @@ Traceback (most recent call last):
    ...
 SyntaxError: keyword argument repeated
 
->>> del ()
-Traceback (most recent call last):
-SyntaxError: can't delete ()
-
 >>> {1, 2, 3} = 42
 Traceback (most recent call last):
 SyntaxError: can't assign to literal
@@ -580,7 +584,7 @@ class SyntaxTestCase(unittest.TestCase):
                 global b  # SyntaxWarning
             """
         warnings.filterwarnings(action='ignore', category=SyntaxWarning)
-        self._check_error(source, "global", lineno=3, offset=16)
+        self._check_error(source, "global")
         warnings.filters.pop(0)
 
     def test_break_outside_loop(self):