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Fix surrogate pair lookahead in String.prototype.toUpper (#4073)

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This patch fixes #4013.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
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Robert Fancsik 2020-07-28 15:53:17 +02:00 committed by GitHub
parent dff2a2a6da
commit 2832bdc94d
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2 changed files with 17 additions and 1 deletions
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3
jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
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@ -1002,7 +1002,8 @@ ecma_builtin_string_prototype_object_conversion_helper (ecma_string_t *input_str
lit_code_point_t cp = lit_cesu8_read_next (&input_curr_p);
#if ENABLED (JERRY_ESNEXT)
if (lit_is_code_point_utf16_high_surrogate (cp))
if (lit_is_code_point_utf16_high_surrogate (cp)
&& input_curr_p < input_str_end_p)
{
const ecma_char_t next_ch = lit_cesu8_peek_next (input_curr_p);
if (lit_is_code_point_utf16_low_surrogate (next_ch))

15
tests/jerry/es.next/regression-test-issue-4013.js Normal file
View File

@ -0,0 +1,15 @@
// 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.
assert("\ud800".toUpperCase() === "\ud800");