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[3.14] gh-130077: Properly match full soft keywords in the parser (GH-135317) (#135348)

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gh-130077: Properly match full soft keywords in the parser (GH-135317)
(cherry picked from commit ff2b5f40c2bf5c71255caac8a743c09ba0758c02)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
This commit is contained in:
Miss Islington (bot) 2025-06-11 03:01:37 +02:00 committed by GitHub
parent 4b96a34978
commit 77c4b5d413
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3 changed files with 11 additions and 1 deletions
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7
Lib/test/test_syntax.py
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@ -382,6 +382,13 @@ SyntaxError: invalid syntax
Traceback (most recent call last):
SyntaxError: invalid syntax
# But prefixes of soft keywords should
# still raise specialized errors
>>> (mat x)
Traceback (most recent call last):
SyntaxError: invalid syntax. Perhaps you forgot a comma?
From compiler_complex_args():
>>> def f(None=1):

2
Misc/NEWS.d/next/Core_and_Builtins/2025-06-09-23-57-37.gh-issue-130077.MHknDB.rst Normal file
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@ -0,0 +1,2 @@
Properly raise custom syntax errors when incorrect syntax containing names
that are prefixes of soft keywords is encountered. Patch by Pablo Galindo.

3
Parser/pegen.c
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@ -610,7 +610,8 @@ expr_ty _PyPegen_soft_keyword_token(Parser *p) {
Py_ssize_t size;
PyBytes_AsStringAndSize(t->bytes, &the_token, &size);
for (char **keyword = p->soft_keywords; *keyword != NULL; keyword++) {
if (strncmp(*keyword, the_token, (size_t)size) == 0) {
if (strlen(*keyword) == (size_t)size &&
strncmp(*keyword, the_token, (size_t)size) == 0) {
return _PyPegen_name_from_token(p, t);
}
}