timers: check can_call_into_js in Immediates

Prevent an infinite loop if it's not possible to call into JS.

PR-URL: #21057
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

src/env.cc

@@ -457,14 +457,17 @@ void Environment::CheckImmediate(uv_check_t* handle) {
 
   env->RunAndClearNativeImmediates();
 
+  if (!env->can_call_into_js())
+    return;
+
   do {
     MakeCallback(env->isolate(),
                  env->process_object(),
                  env->immediate_callback_function(),
                  0,
                  nullptr,
                  {0, 0}).ToLocalChecked();
-  } while (env->immediate_info()->has_outstanding());
+  } while (env->immediate_info()->has_outstanding() && env->can_call_into_js());
 
   if (env->immediate_info()->ref_count() == 0)
     env->ToggleImmediateRef(false);