[CI Postmortem] Flaky: MonoTouchFixtures.Foundation.UrlProtocolTest.RegistrarTest

[rolfbjarne]

Summary

MonoTouchFixtures.Foundation.UrlProtocolTest.RegistrarTest is failing intermittently. It was confirmed flaky by rerun recovery: on PR #25183 (same commit 3a0e9a9f), it failed in build 13884678 but passed in build 13884667.

Failure Details

Test: MonoTouchFixtures.Foundation.UrlProtocolTest.RegistrarTest
Suite: monotouch-test (macOS)
Error message:

State
Expected: 5
But was:  4

Classification

• Type: Flaky test (confirmed by rerun recovery)
• Impact: 2 PRs, 2 builds
• Confidence: High — same commit passed and failed on different runs

Affected Builds

PR	Build	Result
#25183	13884678	Failed
#25183	13884667	Passed (same commit)
#25209	13904091	Failed

Root Cause Hypothesis

The test checks URL protocol registration state and appears to have a race condition or timing dependency — the state value is 4 instead of the expected 5, suggesting an async operation hasn't completed yet.

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Filed automatically by CI postmortem analysis.