Adding `GC.compact` and compacting GC support.

This commit adds the new method `GC.compact` and compacting GC support.
Please see this issue for caveats:

  https://bugs.ruby-lang.org/issues/15626

[Feature #15626]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67576 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/vm_eval.c b/vm_eval.c
index f05621e2b4..fc271415a6 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -484,6 +484,7 @@ rb_type_str(enum ruby_value_type type)
       case type_case(T_NODE);
       case type_case(T_ICLASS);
       case type_case(T_ZOMBIE);
+      case type_case(T_MOVED);
       case T_MASK: break;
     }
 #undef type_case