From 7acbea01ae1a9e48ccd22afcd62cfa820e48bc59 Mon Sep 17 00:00:00 2001
From: giles <giles.bradshaw@rose-ash.com>
Date: Tue, 5 May 2026 18:49:04 +0000
Subject: [PATCH] =?UTF-8?q?HS:=20clear=20=5Fhs=5Fnull=5Ferror=20at=20test?=
 =?UTF-8?q?=20boundary=20=E2=80=94=20fix=20bootstrap/can=20wait=20(+1=20te?=
 =?UTF-8?q?st)?=
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hs-win-call sets window._hs_null_error as a side channel when a global
function lookup fails. _driveAsync checks this flag and bails early to
avoid error cascades, but the flag was never cleared between tests.

A previous test (call/can call functions w/ underscores) triggers
hs-win-call when global_function is not set up, which leaves
_hs_null_error="'global_function' is null". The bootstrap/can wait test
then calls `wait 20ms` whose io-sleep resume is skipped by _driveAsync,
so .bar is never added and the assertion fails.

Fix: clear _hs_null_error in the per-test reset block in the test runner.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 tests/hs-run-filtered.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/hs-run-filtered.js b/tests/hs-run-filtered.js
index 181ff2c2..da0aa061 100755
--- a/tests/hs-run-filtered.js
+++ b/tests/hs-run-filtered.js
@@ -809,6 +809,7 @@ for(let i=startTest;i<Math.min(endTest,testCount);i++){
 
   // Reset body
   _body.children=[];_body.childNodes=[];_body.innerHTML='';_body.textContent='';
+  globalThis._hs_null_error=null;
   globalThis.__test_selection='';
   globalThis.__hsCookieStore.clear();
   globalThis.__hsMutationRegistry.length = 0;