Dump fstr and frozen status in rb_raw_obj_info_buitin_type

1 files changed, 4 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index c47f68c50c..9ac68ccb40 100644
--- a/gc.c
+++ b/gc.c
@@ -4844,6 +4844,10 @@ rb_raw_obj_info_buitin_type(char *const buff, const size_t buff_size, const VALU
             }
             break;
           case T_STRING: {
+            APPEND_F("[%s%s] ",
+                     C(FL_TEST(obj, RSTRING_FSTR), "F"),
+                     C(RB_OBJ_FROZEN(obj), "R"));
+
             if (STR_SHARED_P(obj)) {
                 APPEND_F(" [shared] len: %ld", RSTRING_LEN(obj));
             }