Add `NULL` pointer check before `void_expr_error()`; fix #4192

94b73b14 · Yukihiro "Matz" Matsumoto · ed2bc5d4 · 94b73b14
Commit 94b73b14 authored Dec 21, 2018 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-compiler/core/parse.y mrbgems/mruby-compiler/core/parse.y +4 -2

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--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -3664,8 +3664,10 @@ void_expr_error(parser_state *p, node *n)
    break;
  case NODE_AND:
  case NODE_OR:
+    if (n->cdr) {
      void_expr_error(p, n->cdr->car);
      void_expr_error(p, n->cdr->cdr);
+    }
    break;
  case NODE_BEGIN:
    if (n->cdr) {