Bug 217262

Description:
imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html

The first failure that I see this on the dashboard was 08/24/20 at r266078, but is not relevant to what would have caused this.  The test then consistently fails until 10/02/20 at r267870.  Then it begins flaky failing.

REPRODUCTION STEPS
I can reproduce this on r267898 and also on r267870 after only one iteration.  The test has been either a constant or now flaky failure since landing.

Command: 
run-webkit-tests --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html

Result: 
Regressions: Unexpected text-only failures (1)
  imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html [ Failure ]

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fmediacapture-record%2FMediaRecorder-peerconnection.https.html&limit=50000&version_name=Catalina&flavor=wk2

Diff Log:
--- /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https-actual.txt
@@ -1,23 +1,21 @@
 
-
-Harness Error (TIMEOUT), message = null
 
 PASS PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":false} with format [passthrough].
 PASS PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":false} with format [passthrough].
 PASS PeerConnection MediaRecorder receives data after onstart, {"video":false,"audio":true} with format [passthrough].
 PASS PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":false,"audio":true} with format [passthrough].
 PASS PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":true} with format [passthrough].
-TIMEOUT PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format [passthrough]. Test timed out
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":false,"audio":true} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":false,"audio":true} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":false} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":false} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":true} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format video/webm;codecs=vp8.
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":false,"audio":true} with format video/webm;codecs=vp9.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":false,"audio":true} with format video/webm;codecs=vp9.
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":false} with format video/webm;codecs=vp9.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":false} with format video/webm;codecs=vp9.
-NOTRUN PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":true} with format video/webm;codecs=vp9.
-NOTRUN PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format video/webm;codecs=vp9.
+PASS PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format [passthrough].
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":false,"audio":true} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":false,"audio":true} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":false} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":false} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":true} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format video/webm;codecs=vp8. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":false,"audio":true} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":false,"audio":true} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":false} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":false} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder receives data after onstart, {"video":true,"audio":true} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"
+FAIL PeerConnection MediaRecorder gets ondata on stopping recorded tracks {"video":true,"audio":true} with format video/webm;codecs=vp9. promise_test: Unhandled rejection with value: object "NotSupportedError: mimeType is not supported"