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authorMiss Islington (bot) <31488909+miss-islington@users.noreply.github.com>2022-06-02 01:04:27 (GMT)
committerGitHub <noreply@github.com>2022-06-02 01:04:27 (GMT)
commit376d53771d4c109876fd3d002fb8aa5e2c8dec89 (patch)
treedd81e8a64947342b90d87797c18258369a306df0
parentae0cf8eab59558816961a1f4ec94427bbb39eb80 (diff)
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gh-93418: Fix an assert when an f-string expression is followed by an '=', but no closing brace. (gh-93419) (gh-93422)
(cherry picked from commit ee70c70aa93d7a41cbe47a0b361b17f9d7ec8acd) Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com> Co-authored-by: Eric V. Smith <ericvsmith@users.noreply.github.com>
-rw-r--r--Lib/test/test_fstring.py1
-rw-r--r--Misc/NEWS.d/next/Core and Builtins/2022-06-01-17-47-40.gh-issue-93418.24dJuc.rst2
-rw-r--r--Parser/string_parser.c4
3 files changed, 6 insertions, 1 deletions
diff --git a/Lib/test/test_fstring.py b/Lib/test/test_fstring.py
index 0c3372f..93aa229 100644
--- a/Lib/test/test_fstring.py
+++ b/Lib/test/test_fstring.py
@@ -1073,6 +1073,7 @@ x = (
"f'{'",
"f'x{<'", # See bpo-46762.
"f'x{>'",
+ "f'{i='", # See gh-93418.
])
# But these are just normal strings.
diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-06-01-17-47-40.gh-issue-93418.24dJuc.rst b/Misc/NEWS.d/next/Core and Builtins/2022-06-01-17-47-40.gh-issue-93418.24dJuc.rst
new file mode 100644
index 0000000..74ad06b
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-06-01-17-47-40.gh-issue-93418.24dJuc.rst
@@ -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=".
diff --git a/Parser/string_parser.c b/Parser/string_parser.c
index 9c12d8c..5e94d47 100644
--- a/Parser/string_parser.c
+++ b/Parser/string_parser.c
@@ -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) {