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Fix lookahead in lexer_check_numbers (#4423)

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This patch fixes #4375.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2021-01-06 07:30:09 +01:00
committed by GitHub
parent 257814d063
commit 6279670484
2 changed files with 25 additions and 2 deletions
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jerry-core/parser/js/js-lexer.c
+5 -2
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@@ -1330,8 +1330,11 @@ lexer_check_numbers (parser_context_t *context_p, /**< context */
if (*source_p != source_end_p && *source_p[0] == LIT_CHAR_UNDERSCORE)
{
*source_p += 1;
if (is_legacy || *source_p[0] == LIT_CHAR_UNDERSCORE
|| *source_p[0] > digit_max || *source_p[0] < LIT_CHAR_0)
if (is_legacy
|| *source_p == source_end_p
|| *source_p[0] == LIT_CHAR_UNDERSCORE
|| *source_p[0] > digit_max
|| *source_p[0] < LIT_CHAR_0)
{
parser_raise_error (context_p, PARSER_ERR_INVALID_UNDERSCORE_IN_NUMBER);
}