Merge pull request #1136 from h2so5/syntax-error-for-incomplete-variable

Add syntax error for incomplete instance/class variables

src/parse.y

@@ -4812,7 +4812,16 @@ parser_yylex(parser_state *p)
       tokadd(p, '@');
       c = nextc(p);
     }
-    if (c != -1 && isdigit(c)) {
+    if (c == -1) {
+      if (p->bidx == 1) {
+	yyerror(p, "incomplete instance variable syntax");
+      }
+      else {
+	yyerror(p, "incomplete class variable syntax");
+      }
+      return 0;
+    }
+    else if (isdigit(c)) {
       if (p->bidx == 1) {
 	yyerror_i(p, "`@%c' is not allowed as an instance variable name", c);
       }