Directly mark compile options from the AST object

`rb_ast_t` holds a reference to this object, so it should mark the
object.  Currently it is relying on the `mark_ary` on `node_buffer` to
ensure that the object stays alive.  But since the array internals can
move, this could cause a segv if compaction impacts the array.

1 files changed, 1 insertions, 0 deletions

diff --git a/node.c b/node.c
index 99558319f8..4c2810b0e2 100644
--- a/node.c
+++ b/node.c
@@ -1184,6 +1184,7 @@ void
 rb_ast_mark(rb_ast_t *ast)
 {
     if (ast->node_buffer) rb_gc_mark(ast->node_buffer->mark_ary);
+    if (ast->body.compile_option) rb_gc_mark(ast->body.compile_option);
 }
 
 void