[Bug #18014] Fix memory leak in GC when using Ractors

When a Ractor is removed, the freelist in the Ractor cache is not
returned to the GC, leaving the freelist permanently lost. This commit
recycles the freelist when the Ractor is destroyed, preventing a memory
leak from occurring.

1 files changed, 3 insertions, 0 deletions

diff --git a/ractor.c b/ractor.c
index b5835a8ca6..7996d1c275 100644
--- a/ractor.c
+++ b/ractor.c
@@ -1486,6 +1486,9 @@ vm_remove_ractor(rb_vm_t *vm, rb_ractor_t *cr)
         }
         vm->ractor.cnt--;
 
+        /* Clear the cached freelist to prevent a memory leak. */
+        rb_gc_ractor_newobj_cache_clear(&cr->newobj_cache);
+
         ractor_status_set(cr, ractor_terminated);
     }
     RB_VM_UNLOCK();