Prevent rb_define_(class|module) classes from moving

Before this commit, classes and modules would be registered with the
VM's `defined_module_hash`.  The key was the ID of the class, but that
meant that it was possible for hash collisions to occur.  The compactor
doesn't allow classes in the `defined_module_hash` to move, but if there
is a conflict, then it's possible a class would be removed from the hash
and not get pined.

This commit changes the key / value of the hash just to be the class
itself, thus preventing movement.

1 files changed, 1 insertions, 1 deletions

diff --git a/gc.c b/gc.c
index f90bdd99bf..9529b2d4a4 100644
--- a/gc.c
+++ b/gc.c
@@ -8159,7 +8159,7 @@ gc_verify_compaction_references(VALUE mod)
     heap_eden->using_page = NULL;
 
     gc_verify_internal_consistency(mod);
-    rb_gc_enable();
+
     /* GC after compaction to eliminate T_MOVED */
     rb_gc();