merge revision(s) 54185: [Backport #12197]

	parse.y: mark debug_buffer

	* parse.y (parser_mark): mark debug_buffer.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54414 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index e7f99d51aa..17a24e4aea 100644
--- a/parse.y
+++ b/parse.y
@@ -10825,6 +10825,7 @@ parser_mark(void *ptr)
     rb_gc_mark(parser->result);
     rb_gc_mark(parser->parsing_thread);
 #endif
+    rb_gc_mark(parser->debug_buffer);
 #ifdef YYMALLOC
     rb_gc_mark((VALUE)parser->heap);
 #endif