Stop initializing local variables to nil

Author: KaanOzkan

insns.def

@@ -79,7 +79,13 @@ getlocal
 ()
 (VALUE val)
 {
-    val = *(vm_get_ep(GET_EP(), level) - idx);
+    // printf("getlocal\n");
+    const VALUE *ep = vm_get_ep(GET_EP(), level);
+    val = *(ep - idx);
+    if (val == Qundef) {
+        printf("Assigning to nil in getlocal\n");
+        val = Qnil;
+    }
     RB_DEBUG_COUNTER_INC(lvar_get);
     (void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
 }

vm_insnhelper.c

@@ -399,8 +399,10 @@ vm_push_frame(rb_execution_context_t *ec,
 
     /* initialize local variables */
     for (int i=0; i < local_size; i++) {
-        *sp++ = Qnil;
+        // *sp++ = Qnil;
+        // printf("in vm_push_frame, local_size: %d\n", local_size);
     }
+    sp += local_size;
 
     /* setup ep with managing data */
     *sp++ = cref_or_me; /* ep[-2] / Qnil or T_IMEMO(cref) or T_IMEMO(ment) */