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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
This commit is contained in:
Robert Fancsik
2020-07-28 15:53:17 +02:00
committed by GitHub
parent dff2a2a6da
commit 2832bdc94d
2 changed files with 17 additions and 1 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.c
+2 -1
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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))