Nightly E2E failure: 2026-05-22

[github-actions]

Nightly E2E failed on 2026-05-22 (tag e2e-ci-nightly).

E2E Test Pass · ❌ FAIL

Tag: e2e-ci-nightly · Branch: main · Commit: 9bb100f · Run logs

Cell	Result	Time
nightly-rejections	✅ PASS	0m43s
pr-deploy-frontend	✅ PASS	4m29s
nightly-mod-miss	✅ PASS	0m48s
nightly-deploy-hardhat	✅ PASS	0m46s
nightly-diagnostic	✅ PASS	0m47s
nightly-chaos-rpc	✅ PASS	1m14s
nightly-chaos-sigint	✅ PASS	2m22s
nightly-deploy-moddable	❌ FAIL	3m03s
pr-mod	✅ PASS	1m15s
pr-deploy-cdm	✅ PASS	2m44s
nightly-deploy-multi	✅ PASS	0m44s
pr-deploy-foundry	✅ PASS	1m25s
pr-init-session	✅ PASS	1m46s
pr-preflight	✅ PASS	1m44s
pr-install	✅ PASS	0m51s

Sentry traces: view spans for this run

• Run: https://github.com/paritytech/playground-cli/actions/runs/26274561054

[ottovlotto]

Fix in progress. Diagnosis from the run logs:

• The CLI itself worked correctly — dot deploy --moddable exited 0, deploy completed, registry entry stamped, "Moddable: yes — " line emitted.
• Cell failed because vitest hung ~30s after junit was written (close timed out after 5000ms / Tests closed successfully but something prevents Vite server from exiting), action runner killed the process → exit code 1 → attempt 1 marked failed.
• nick-fields/retry then re-ran setup; attempt 2's gh repo create paritytech/e2e-cli-moddable-${runId} collided with attempt 1's leftover repo ("Name already exists"), so attempt 2 failed too. The junit got overwritten with the gh-repo-create error, masking attempt 1's likely-passing result.

Two real issues, both test-infra:

1. Vitest teardown hang — something in the test process is keeping the event loop alive after destroyTestClient(). Diagnosing locally via --reporter=hanging-process to find the actual leak (likely a cached registry contract handle in e2e/cli/fixtures/registry.ts, but verifying before fixing).
2. setupModdableFixture is not retry-safe — needs to detect and reuse an existing repo on retry, plus an if: always() cleanup post-step in the workflow.

PR coming on a becca/* branch shortly. Will close this when the fix lands and the next nightly goes green.