From b189dc6926fffe1cdb04422c5116ad3ca1425cb7 Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@atdot.net>
Date: Wed, 16 Sep 2020 09:05:25 +0900
Subject: rb_obj_info() shows more info for T_SYMBOL

---
 gc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gc.c b/gc.c
index 38d146362d..4b0fd06bfc 100644
--- a/gc.c
+++ b/gc.c
@@ -11861,6 +11861,17 @@ rb_raw_obj_info(char *buff, const int buff_size, VALUE obj)
             APPENDF((BUFF_ARGS, "%.*s", str_len_no_raise(obj), RSTRING_PTR(obj)));
 	    break;
 	  }
+          case T_SYMBOL: {
+              VALUE fstr = RSYMBOL(obj)->fstr;
+              ID id = RSYMBOL(obj)->id;
+              if (RB_TYPE_P(fstr, T_STRING)) {
+                  APPENDF((BUFF_ARGS, ":%s id:%d", RSTRING_PTR(fstr), (unsigned int)id));
+              }
+              else {
+                  APPENDF((BUFF_ARGS, "(%p) id:%d", (void *)fstr, (unsigned int)id));
+              }
+              break;
+          }
           case T_MOVED: {
             APPENDF((BUFF_ARGS, "-> %p", (void*)rb_gc_location(obj)));
             break;
-- 
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