diff --git a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c index 036ae6371..6424c8014 100644 --- a/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c +++ b/jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray-prototype.c @@ -708,7 +708,7 @@ ecma_op_typedarray_set_with_typedarray (ecma_value_t this_arg, /**< this argumen /* 9. targetBuffer */ ecma_object_t *target_arraybuffer_p = ecma_typedarray_get_arraybuffer (target_typedarray_p); - lit_utf8_byte_t *target_buffer_p = ecma_typedarray_get_buffer (target_typedarray_p); + lit_utf8_byte_t *target_buffer_p = ecma_arraybuffer_get_buffer (target_arraybuffer_p); /* 11. targetLength */ ecma_length_t target_length = ecma_typedarray_get_length (target_typedarray_p); @@ -754,6 +754,12 @@ ecma_op_typedarray_set_with_typedarray (ecma_value_t this_arg, /**< this argumen return ecma_raise_range_error (ECMA_ERR_MSG ("Invalid range of index")); } + /* Fast path first. If the source and target arrays are the same we do not need to copy anything. */ + if (this_arg == arr_val) + { + return ECMA_VALUE_UNDEFINED; + } + /* 24.d, 25. srcByteIndex */ ecma_length_t src_byte_index = 0; diff --git a/tests/jerry/es2015/regression-test-issue-2757.js b/tests/jerry/es2015/regression-test-issue-2757.js new file mode 100644 index 000000000..409141849 --- /dev/null +++ b/tests/jerry/es2015/regression-test-issue-2757.js @@ -0,0 +1,18 @@ +// 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 v1 = (new Int8Array (149)).subarray (78); +var v1ToString = v1.toString (); +v1.set (v1); +assert (v1ToString === v1.toString ());