Fix SEGV from numbered parameters outside of blocks; fix #4862

5cc595cb · Yukihiro "Matz" Matsumoto · ef8621cb · 5cc595cb
Commit 5cc595cb authored Dec 21, 2019 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
@@ -5952,7 +5952,7 @@ parser_yylex(parser_state *p)
      break;

    case '_':
-      if (toklen(p) == 2 && ISDIGIT(tok(p)[1])) {
+      if (toklen(p) == 2 && ISDIGIT(tok(p)[1]) && p->nvars) {
        int n = tok(p)[1] - '0';
        node *nvars = p->nvars->car;