[Python-checkins] bpo-25130: Make unit-test about restricting the maximum number of nested blocks cpython-only (GH-28002)
serhiy-storchaka
webhook-mailer at python.org
Sat Aug 28 14:33:59 EDT 2021
https://github.com/python/cpython/commit/eb263f9a356f5c5f21b8d5ce20bac92f31c40cad
commit: eb263f9a356f5c5f21b8d5ce20bac92f31c40cad
branch: main
author: Carl Friedrich Bolz-Tereick <cfbolz at gmx.de>
committer: serhiy-storchaka <storchaka at gmail.com>
date: 2021-08-28T21:33:50+03:00
summary:
bpo-25130: Make unit-test about restricting the maximum number of nested blocks cpython-only (GH-28002)
PyPy and potentially other implementations have different or no
contraints on the number of blocks that can be statically nested. move
the test that checks for this behaviour into a unit test and mark it as
CPython-only.
files:
M Lib/test/test_syntax.py
diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 43780ce273ef4..be8be898d0196 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -629,38 +629,6 @@
...
SyntaxError: 'break' outside loop
-This raises a SyntaxError, it used to raise a SystemError.
-Context for this change can be found on issue #27514
-
-In 2.5 there was a missing exception and an assert was triggered in a debug
-build. The number of blocks must be greater than CO_MAXBLOCKS. SF #1565514
-
- >>> while 1:
- ... while 2:
- ... while 3:
- ... while 4:
- ... while 5:
- ... while 6:
- ... while 8:
- ... while 9:
- ... while 10:
- ... while 11:
- ... while 12:
- ... while 13:
- ... while 14:
- ... while 15:
- ... while 16:
- ... while 17:
- ... while 18:
- ... while 19:
- ... while 20:
- ... while 21:
- ... while 22:
- ... break
- Traceback (most recent call last):
- ...
- SyntaxError: too many statically nested blocks
-
Misuse of the nonlocal and global statement can lead to a few unique syntax errors.
>>> def f():
@@ -1550,6 +1518,41 @@ def test_multiline_compiler_error_points_to_the_end(self):
lineno=3
)
+ @support.cpython_only
+ def test_syntax_error_on_deeply_nested_blocks(self):
+ # This raises a SyntaxError, it used to raise a SystemError. Context
+ # for this change can be found on issue #27514
+
+ # In 2.5 there was a missing exception and an assert was triggered in a
+ # debug build. The number of blocks must be greater than CO_MAXBLOCKS.
+ # SF #1565514
+
+ source = """
+while 1:
+ while 2:
+ while 3:
+ while 4:
+ while 5:
+ while 6:
+ while 8:
+ while 9:
+ while 10:
+ while 11:
+ while 12:
+ while 13:
+ while 14:
+ while 15:
+ while 16:
+ while 17:
+ while 18:
+ while 19:
+ while 20:
+ while 21:
+ while 22:
+ break
+"""
+ self._check_error(source, "too many statically nested blocks")
+
def test_main():
support.run_unittest(SyntaxTestCase)
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