diff --git a/Libraries/LibJS/AST.cpp b/Libraries/LibJS/AST.cpp index b40b87e1f0..0a68b154c8 100644 --- a/Libraries/LibJS/AST.cpp +++ b/Libraries/LibJS/AST.cpp @@ -1552,7 +1552,7 @@ Value ObjectExpression::execute(Interpreter& interpreter, GlobalObject& global_o if (key.is_array()) { auto& array_to_spread = static_cast(key.as_object()); for (auto& entry : array_to_spread.indexed_properties()) { - object->indexed_properties().append(entry.value_and_attributes(&array_to_spread).value); + object->indexed_properties().put(object, entry.index(), entry.value_and_attributes(&array_to_spread).value); if (interpreter.exception()) return {}; } diff --git a/Libraries/LibJS/Tests/object-spread.js b/Libraries/LibJS/Tests/object-spread.js index 11b33dfad5..93008a8352 100644 --- a/Libraries/LibJS/Tests/object-spread.js +++ b/Libraries/LibJS/Tests/object-spread.js @@ -53,6 +53,11 @@ test("spread array in object literal", () => { testObjStrSpread(obj); }); +test("spread array with holes in object literal", () => { + const obj = { ...[, , "a", , , , "b", "c", , "d", , ,] }; + expect(obj).toEqual({ 2: "a", 6: "b", 7: "c", 9: "d" }); +}); + test("spread string object in object literal", () => { const obj = { ...String("abcd") }; testObjStrSpread(obj);