mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-17 20:28:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

gh-104016: Fixed off by 1 error in f string tokenizer (#104047)

Browse source 
Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>
Co-authored-by: Ken Jin <kenjin@python.org>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
This commit is contained in:
jx124 2023-05-02 03:15:47 +08:00 • committed by GitHub
parent 2d526cd32f
commit 5078eedc5b
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 25 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Lib/test/test_fstring.py
View file

@ -565,7 +565,23 @@ x = (
self.assertAllRaise(SyntaxError,
"f-string: expressions nested too deeply",
['f"{1+2:{1+2:{1+1:{1}}}}"'])
def create_nested_fstring(n):
if n == 0:
return "1+1"
prev = create_nested_fstring(n-1)
return f'f"{{{prev}}}"'
self.assertAllRaise(SyntaxError,
"too many nested f-strings",
[create_nested_fstring(160)])
def test_syntax_error_in_nested_fstring(self):
# See gh-104016 for more information on this crash
self.assertAllRaise(SyntaxError,
"invalid syntax",
['f"{1 1:' + ('{f"1:' * 199)])
def test_double_braces(self):
self.assertEqual(f'{{', '{')
self.assertEqual(f'a{{', 'a{')