Fixed a wrong condition in `scan_hex`; fix #3774

56d4e41d · Yukihiro "Matz" Matsumoto · 96d4c2d3 · 56d4e41d
Commit 56d4e41d authored Aug 11, 2017 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-compiler/core/parse.y mrbgems/mruby-compiler/core/parse.y +1 -1

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--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -3783,7 +3783,7 @@ scan_hex(parser_state *p, const int *start, int len, int *retlen)
  }
  *retlen = s - start;

-  if (retval > 0x10FFFF || (retval & 0xFFFFF800) == 0xD800) {
+  if (*retlen == 0 || retval > 0x10FFFF || (retval & 0xFFFFF800) == 0xD800) {
    yyerror(p, "Invalid Unicode code point");
    return -1;
  }