diff --git a/Python/compile.c b/Python/compile.c
index 9226bc233ead74..f9afd44c701283 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -4926,12 +4926,16 @@ compiler_joined_str(struct compiler *c, expr_ty e)
{
location loc = LOC(e);
Py_ssize_t value_count = asdl_seq_LEN(e->v.JoinedStr.values);
- if (value_count > STACK_USE_GUIDELINE) {
+ if (!value_count || value_count > STACK_USE_GUIDELINE) {
+ /* Also handle empty f-strings here */
_Py_DECLARE_STR(empty, "");
ADDOP_LOAD_CONST_NEW(c, loc, Py_NewRef(&_Py_STR(empty)));
+ if (!value_count) {
+ return 1;
+ }
ADDOP_NAME(c, loc, LOAD_METHOD, &_Py_ID(join), names);
ADDOP_I(c, loc, BUILD_LIST, 0);
- for (Py_ssize_t i = 0; i < asdl_seq_LEN(e->v.JoinedStr.values); i++) {
+ for (Py_ssize_t i = 0; i < value_count; i++) {
VISIT(c, expr, asdl_seq_GET(e->v.JoinedStr.values, i));
ADDOP_I(c, loc, LIST_APPEND, 1);
}
@@ -4939,8 +4943,8 @@ compiler_joined_str(struct compiler *c, expr_ty e)
}
else {
VISIT_SEQ(c, expr, e->v.JoinedStr.values);
- if (asdl_seq_LEN(e->v.JoinedStr.values) != 1) {
- ADDOP_I(c, loc, BUILD_STRING, asdl_seq_LEN(e->v.JoinedStr.values));
+ if (value_count != 1) {
+ ADDOP_I(c, loc, BUILD_STRING, value_count);
}
}
return 1;
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