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parse.y: curtail scanning

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* parse.y (parser_yyerror): curtail scanning range, not to exceed
  the max margin.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57075 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-12-14 07:30:41 +00:00
parent 2027ad600b
commit 07e7981d42
1 changed files with 5 additions and 2 deletions
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parse.y
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@ -5255,18 +5255,21 @@ parser_yyerror(struct parser_params *parser, const char *msg)
const char *p, *pe;
const char *pre = "", *post = "";
const char *code = "", *caret = "", *newline = "";
const char *lim;
char *buf;
long len;
int i;
p = lex_p;
while (lex_pbeg < p) {
lim = p - lex_pbeg > max_line_margin ? p - max_line_margin : lex_pbeg;
while (lim < p) {
if (*(p-1) == '\n') break;
p--;
}
pe = lex_p;
while (pe < lex_pend) {
lim = lex_pend - pe > max_line_margin ? pe + max_line_margin : lex_pend;
while (pe < lim) {
if (*pe == '\n') break;
pe++;
}