From dcf925289220f406ba93569ecc4939c24fbf2914 Mon Sep 17 00:00:00 2001 From: Robert Fancsik Date: Mon, 11 Jan 2021 12:30:52 +0100 Subject: [PATCH] Fix mapped arguments legacy argument definition initialization (#4434) This patch fixes #4432. JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu --- .../ecma/operations/ecma-arguments-object.c | 2 +- .../es.next/regression-test-issue-4432.js | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) create mode 100644 tests/jerry/es.next/regression-test-issue-4432.js diff --git a/jerry-core/ecma/operations/ecma-arguments-object.c b/jerry-core/ecma/operations/ecma-arguments-object.c index aefc97188..e2bafbede 100644 --- a/jerry-core/ecma/operations/ecma-arguments-object.c +++ b/jerry-core/ecma/operations/ecma-arguments-object.c @@ -137,7 +137,7 @@ ecma_op_create_arguments_object (vm_frame_ctx_shared_args_t *shared_p, /**< shar ecma_deref_ecma_string (prop_name_p); - prop_value_p->value = argv_p[i]; + prop_value_p->value = argv_p[i] == ECMA_VALUE_INITIALIZED ? ECMA_VALUE_UNDEFINED : argv_p[i]; argv_p[i] = ECMA_VALUE_EMPTY; } } diff --git a/tests/jerry/es.next/regression-test-issue-4432.js b/tests/jerry/es.next/regression-test-issue-4432.js new file mode 100644 index 000000000..56f3bcbea --- /dev/null +++ b/tests/jerry/es.next/regression-test-issue-4432.js @@ -0,0 +1,19 @@ +// 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. + +function f(x,x,x) { + return arguments[1]; +} + +assert(f(1) === undefined);