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-rw-r--r--py/objstr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/py/objstr.c b/py/objstr.c
index 0621a8df75..7c1be50cc0 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -270,7 +270,8 @@ mp_obj_t str_format(int n_args, const mp_obj_t *args) {
str++;
if (*str == '{') {
vstr_add_char(vstr, '{');
- } else if (*str == '}') {
+ } else {
+ while (*str != '}') str++;
if (arg_i >= n_args) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_IndexError, "tuple index out of range"));
}