René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Flaky: debug E2E misses the breakpoint on macOS","articleBody":"The debug E2E added in #76, `Rstest debug launch hits a breakpoint with port 9229 occupied and cleans up after continue`, failed once on macOS and passed on rerun.\n\n- Run: https://github.com/rstackjs/rstack-editor/actions/runs/36577017621 (attempt 1, `E2E (macos-latest)`), on #78, whose change does not touch debugging or the `workspace-1` fixture (string titles only).\n- Failure: `AssertionError [ERR_ASSERTION]: debuggee should stop at the breakpoint` from the `waitFor` at `e2e/rstest/suite/debug.test.ts:66`. After the timeout the run is torn down (`Rstest debug worker disconnected`, `[birpc] rpc is closed, cannot call \"runTest\"`).\n- The same test passed in the previous four CI runs on that branch and on `main`.\n\nTo find out: whether the breakpoint is sometimes bound after the debuggee has already passed it (js-debug child auto-attach timing on macOS), or the `waitFor` timeout is too tight for a slow runner.\n","author":{"url":"https://github.com/fi3ework","@type":"Person","name":"fi3ework"},"datePublished":"2026-09-29T13:58:40Z","url":"https://github.com/rstackjs/rstack-editor/issues/79"}