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gh-93418: Fix an assert when an f-string expression is followed by an '=', but no closing brace. (gh-93419)

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Eric V. Smith 2022-06-01 19:20:06 -04:00 committed by GitHub
parent 8a221a8537
commit ee70c70aa9
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3 changed files with 6 additions and 1 deletions
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1
Lib/test/test_fstring.py
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@ -1084,6 +1084,7 @@ def test_mismatched_braces(self):
"f'{'",
"f'x{<'", # See bpo-46762.
"f'x{>'",
"f'{i='", # See gh-93418.
])
# But these are just normal strings.

2
Misc/NEWS.d/next/Core and Builtins/2022-06-01-17-47-40.gh-issue-93418.24dJuc.rst Normal file
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@ -0,0 +1,2 @@
Fixed an assert where an f-string has an equal sign '=' following an
expression, but there's no trailing brace. For example, f"{i=".

4
Parser/string_parser.c
View file

@ -756,7 +756,9 @@ fstring_find_expr(Parser *p, const char **str, const char *end, int raw, int rec
while (Py_ISSPACE(**str)) {
*str += 1;
}
if (*str >= end) {
goto unexpected_end_of_string;
}
/* Set *expr_text to the text of the expression. */
*expr_text = PyUnicode_FromStringAndSize(expr_start, *str-expr_start);
if (!*expr_text) {