merge revision(s) 57407: [Backport #13145]

	object.c: no TypeError at Symbol

	* object.c (special_object_p): uninterned Symbol also should not
	  raise a TypeError but return itself instead, as well as interned
	  Symbols.  [ruby-core:79216] [Bug #13145]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57869 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/object.c b/object.c
index 5f0055fb5a..98d2197c2d 100644
--- a/object.c
+++ b/object.c
@@ -304,6 +304,7 @@ special_object_p(VALUE obj)
     switch (BUILTIN_TYPE(obj)) {
       case T_BIGNUM:
       case T_FLOAT:
+      case T_SYMBOL:
 	return TRUE;
       default:
 	return FALSE;