* rb_enc_get_index: allows an arbitrary RData as the argument but not

  only what points a rb_encoding.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23501 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/encoding.c b/encoding.c
index 4ef45cd65e..574193a96f 100644
--- a/encoding.c
+++ b/encoding.c
@@ -566,6 +566,7 @@ rb_enc_get_index(VALUE obj)
     VALUE tmp;
 
     switch (BUILTIN_TYPE(obj)) {
+as_default:
         default:
 	case T_STRING:
 	case T_REGEXP:
@@ -586,6 +587,9 @@ rb_enc_get_index(VALUE obj)
 	    if (RDATA(obj)->dmark == enc_mark) {
 		i = enc_check_encoding(obj);
 	    }
+            else {
+                goto as_default;
+            }
 	    break;
     }
     return i;