From 351b88184cc91986ee633d3d278eec8eb5d774f0 Mon Sep 17 00:00:00 2001 From: Robert Fancsik Date: Mon, 28 Oct 2019 10:33:28 +0100 Subject: [PATCH] Arrow functions prototype property should not be lazy instantiated (#3251) This patch fixes #3250 JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu --- .../ecma/operations/ecma-function-object.c | 3 ++- tests/jerry/es2015/regression-test-issue-3250.js | 16 ++++++++++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) create mode 100644 tests/jerry/es2015/regression-test-issue-3250.js diff --git a/jerry-core/ecma/operations/ecma-function-object.c b/jerry-core/ecma/operations/ecma-function-object.c index e2e7ef9de..6c5152b2f 100644 --- a/jerry-core/ecma/operations/ecma-function-object.c +++ b/jerry-core/ecma/operations/ecma-function-object.c @@ -1260,7 +1260,8 @@ ecma_op_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< { JERRY_ASSERT (!ecma_get_object_is_builtin (object_p)); - if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE)) + if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE) + && ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION) { return ecma_op_lazy_instantiate_prototype_object (object_p); } diff --git a/tests/jerry/es2015/regression-test-issue-3250.js b/tests/jerry/es2015/regression-test-issue-3250.js new file mode 100644 index 000000000..abe121d81 --- /dev/null +++ b/tests/jerry/es2015/regression-test-issue-3250.js @@ -0,0 +1,16 @@ +// Copyright JS Foundation and other contributors, http://js.foundation +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +var arrowFn = () => { }; +assert (arrowFn.prototype === undefined);