Index: parse.y
===================================================================
--- parse.y	(revision 25401)
+++ parse.y	(working copy)
@@ -4744,6 +4744,18 @@
 }
 
 static void
+ripper_dispatch_ignored_scan_event(struct parser_params *parser, int t)
+{
+    VALUE str;
+
+    if (lex_p < parser->tokp) rb_raise(rb_eRuntimeError, "lex_p < tokp");
+    if (lex_p == parser->tokp) return;
+    str = STR_NEW(parser->tokp, lex_p - parser->tokp);
+    ripper_dispatch1(parser, ripper_token2eventid(t), str);
+    ripper_flush(parser);
+}
+
+static void
 ripper_dispatch_delayed_token(struct parser_params *parser, int t)
 {
     int saved_line = ruby_sourceline;
@@ -5900,7 +5912,7 @@
     if (!NIL_P(parser->delayed))
 	ripper_dispatch_delayed_token(parser, tSTRING_CONTENT);
     lex_goto_eol(parser);
-    ripper_dispatch_scan_event(parser, tHEREDOC_END);
+    ripper_dispatch_ignored_scan_event(parser, tHEREDOC_END);
 #endif
     line = here->nd_orig;
     lex_lastline = line;