1 files changed, 2 insertions, 5 deletions
diff --git a/thread.c b/thread.c
index df583266eb..8953c270bb 100644
--- a/thread.c
+++ b/thread.c
@@ -599,11 +599,8 @@ thread_cleanup_func_before_exec(void *th_ptr)
     // The thread stack doesn't exist in the forked process:
     th->ec->machine.stack_start = th->ec->machine.stack_end = NULL;
 
-    // Appears to be causing a lot of issues.
-    if (0) {
-      // The vm_stack is `alloca`ed on the thread stack, so it's gone too:
-      rb_ec_clear_vm_stack(th->ec);
-    }
+    // The vm_stack is `alloca`ed on the thread stack, so it's gone too:
+    rb_ec_clear_vm_stack(th->ec);
 }
 
 static void