Bugzilla

The following is the preliminary result of the investigation.

Chunk sizes were altered for different runs to investigate and isolate the following:

- is the inherently the name 'wpt11' that is the issue?
- is it a certain test that is the issue?
- could it be the timing?

## Chunk counts

### chunk 120
chunk 71 failed

### chunk 48
chunk 23 failed

### chunk 24
chunk 11 failed

### chunk 20
chunk 11 failed

It is possible to glean from this that the problem is not with the 'wpt11' chunk name but rather the test.

## Test file

Analyzing the contents of the failed chunk from wpt11, wpt23 and wpt71 shows the following:

wpt11 ∩ wpt23 = 130 tests:
```
/FileAPI/FileReaderSync.worker.html
/FileAPI/fileReader.html
/FileAPI/historical.https.html
/FileAPI/idlharness.html
/FileAPI/idlharness.worker.html
/FileAPI/unicode.html
/client-hints/accept_ch.http.html
/client-hints/accept_ch.tentative.https.html
/client-hints/accept_ch.tentative.sub.https.html
/client-hints/accept_ch_lifetime_cross_origin_iframe.tentative.sub.https.html
/client-hints/accept_ch_lifetime_same_origin_iframe.tentative.https.html
/client-hints/accept_ch_lifetime_subresource.tentative.https.html
/client-hints/accept_ch_malformed_header.https.html
/client-hints/http_equiv_accept_ch.tentative.http.html
/client-hints/http_equiv_accept_ch.tentative.https.html
/client-hints/http_equiv_accept_ch.tentative.sub.https.html
/client-hints/http_equiv_accept_ch_lifetime_cross_origin_iframe.tentative.sub.https.html
/client-hints/http_equiv_accept_ch_lifetime_same_origin_iframe.tentative.https.html
/client-hints/http_equiv_accept_ch_lifetime_subresource.tentative.https.html
/client-hints/http_equiv_accept_ch_malformed_header.tentative.https.html
/client-hints/image-with-dpr-header.html
/client-hints/sec-ch-ua.http.html
/client-hints/sec-ch-ua.https.html
/css/css-animations/AnimationEffect-getComputedTiming.tentative.html
/css/css-animations/CSSAnimation-animationName.tentative.html
/css/css-animations/CSSAnimation-canceling.tentative.html
/css/css-animations/CSSAnimation-effect.tentative.html
/css/css-animations/CSSAnimation-finished.tentative.html
/css/css-animations/CSSAnimation-getCurrentTime.tentative.html
/css/css-animations/CSSAnimation-id.tentative.html
/css/css-animations/CSSAnimation-pausing.tentative.html
/css/css-animations/CSSAnimation-playState.tentative.html
/css/css-animations/CSSAnimation-ready.tentative.html
/css/css-animations/CSSAnimation-startTime.tentative.html
/css/css-animations/CSSPseudoElement-getAnimations.tentative.html
/css/css-animations/Document-getAnimations.tentative.html
/css/css-animations/Element-getAnimations-dynamic-changes.tentative.html
/css/css-animations/Element-getAnimations.tentative.html
/css/css-animations/KeyframeEffect-getKeyframes.tentative.html
/css/css-animations/KeyframeEffect-target.tentative.html
/css/css-animations/animation-iteration-count-calc.html
/css/css-animations/animationevent-interface.html
/css/css-animations/animationevent-marker-pseudoelement.html
/css/css-animations/animationevent-pseudoelement.html
/css/css-animations/animationevent-types.html
/css/css-animations/computed-style-animation-parsing.html
/css/css-animations/event-dispatch.tentative.html
/css/css-animations/event-order.tentative.html
/css/css-animations/historical.html
/css/css-animations/idlharness.html
/css/css-animations/inheritance.html
/css/css-animations/pending-style-changes-001.html
/css/css-animations/style-animation-parsing.html
/css/css-text/overflow-wrap/overflow-wrap-anywhere-span-002.html
/css/css-text/overflow-wrap/overflow-wrap-break-word-span-002.html
/css/css-text/overflow-wrap/word-wrap-alias.html
/media-source/SourceBuffer-abort-readyState.html
/media-source/SourceBuffer-abort-removed.html
/media-source/SourceBuffer-abort.html
/media-source/URL-createObjectURL-null.html
/media-source/URL-createObjectURL-revoke.html
/media-source/URL-createObjectURL.html
/media-source/idlharness.any.worker.html
/media-source/idlharness.any.html
/media-source/mediasource-activesourcebuffers.html
/media-source/mediasource-addsourcebuffer-mode.html
/media-source/mediasource-addsourcebuffer.html
/media-source/mediasource-append-buffer.html
/media-source/mediasource-appendbuffer-quota-exceeded.html
/media-source/mediasource-appendwindow.html
/media-source/mediasource-attach-stops-delaying-load-event.html
/media-source/mediasource-avtracks.html
/media-source/mediasource-buffered.html
/media-source/mediasource-changetype-play.html
/media-source/mediasource-changetype.html
/media-source/mediasource-closed.html
/media-source/mediasource-config-change-mp4-av-framesize.html
/media-source/mediasource-config-change-mp4-av-video-bitrate.html
/media-source/mediasource-config-change-mp4-v-bitrate.html
/media-source/mediasource-config-change-mp4-v-framerate.html
/media-source/mediasource-config-change-mp4-v-framesize.html
/media-source/mediasource-config-change-webm-a-bitrate.html
/media-source/mediasource-config-change-webm-av-audio-bitrate.html
/media-source/mediasource-config-change-webm-av-framesize.html
/media-source/mediasource-config-change-webm-av-video-bitrate.html
/media-source/mediasource-config-change-webm-v-bitrate.html
/media-source/mediasource-config-change-webm-v-framerate.html
/media-source/mediasource-config-change-webm-v-framesize.html
/media-source/mediasource-detach.html
/media-source/mediasource-duration-boundaryconditions.html
/media-source/mediasource-endofstream-invaliderror.html
/media-source/mediasource-endofstream.html
/media-source/mediasource-errors.html
/media-source/mediasource-getvideoplaybackquality.html
/media-source/mediasource-invalid-codec.html
/media-source/mediasource-is-type-supported.html
/media-source/mediasource-liveseekable.html
/media-source/mediasource-multiple-attach.html
/media-source/mediasource-play-then-seek-back.html
/media-source/mediasource-play.html
/media-source/mediasource-preload.html
/media-source/mediasource-remove.html
/media-source/mediasource-removesourcebuffer.html
/media-source/mediasource-seek-beyond-duration.html
/media-source/mediasource-seek-during-pending-seek.html
/media-source/mediasource-seekable.html
/media-source/mediasource-sequencemode-append-buffer.html
/media-source/mediasource-sourcebuffer-mode-timestamps.html
/media-source/mediasource-sourcebuffer-mode.html
/media-source/mediasource-sourcebuffer-trackdefaults.html
/media-source/mediasource-sourcebufferlist.html
/media-source/mediasource-timestamp-offset.html
/media-source/mediasource-trackdefault.html
/media-source/mediasource-trackdefaultlist.html
/mixed-content/audio-tag/http-csp/same-host-https/top-level/no-redirect/allowed/allowed.https.html
/mixed-content/worklet-paint-data-import/no-opt-in/same-host-https/top-level/keep-scheme-redirect/allowed/allowed.https.html
/payment-method-basic-card/historical.https.html
/payment-method-basic-card/idlharness.window.html
/payment-method-basic-card/payment-request-canmakepayment-method.https.html
/referrer-policy/no-referrer-when-downgrade/meta-referrer/cross-origin/http-http/a-tag/no-redirect/insecure-protocol.http.html
/referrer-policy/no-referrer/meta-referrer/same-origin/http-http/script-tag/swap-origin-redirect/generic.http.html
/referrer-policy/origin/http-rp/cross-origin/http-https/iframe-tag/swap-origin-redirect/generic.http.html
/referrer-policy/same-origin/meta-referrer/same-origin/http-https/img-tag/swap-origin-redirect/same-origin-insecure.http.html
/referrer-policy/strict-origin-when-cross-origin/attr-referrer/same-origin/http-https/script-tag/swap-origin-redirect/upgrade-protocol.http.html
/referrer-policy/strict-origin/meta-referrer/cross-origin/http-https/img-tag/no-redirect/upgrade-protocol.http.html
/referrer-policy/unsafe-url/meta-referrer/same-origin/http-https/img-tag/no-redirect/generic.http.html
/referrer-policy/unset-referrer-policy/http-rp/cross-origin/http-http/img-tag/no-redirect/insecure-protocol.http.html
/referrer-policy/unset-referrer-policy/http-rp/same-origin/http-http/img-tag/swap-origin-redirect/insecure-protocol.http.html
/webaudio/the-audio-api/the-oscillatornode-interface/ctor-oscillator.html
/webaudio/the-audio-api/the-oscillatornode-interface/detune-limiting.html
```

(wpt11 ∩ wpt23) ∩ wpt71 = also 130 tests.

It would appear the tests that are causing a crash is one of the 130 listed.

The following is the preliminary result of the investigation.

Chunk sizes were altered for different runs to investigate and isolate the following:

- is the inherently the name 'wpt11' that is the issue?
- is it a certain test that is the issue?
- could it be the timing?

## Chunk counts

### chunk 120
chunk 71 failed

### chunk 48
chunk 23 failed

### chunk 24
chunk 11 failed

### chunk 20
chunk 11 failed

It is possible to glean from this that the problem is not with the 'wpt11' chunk name but rather the test.

## Test file

Analyzing the contents of the failed chunk from wpt11, wpt23 and wpt71 shows the following:

wpt11 ∩ wpt23 = 130 tests:
```
/FileAPI/FileReaderSync.worker.html
/FileAPI/fileReader.html
/FileAPI/historical.https.html
/FileAPI/idlharness.html
/FileAPI/idlharness.worker.html
/FileAPI/unicode.html
/client-hints/accept_ch.http.html
/client-hints/accept_ch.tentative.https.html
/client-hints/accept_ch.tentative.sub.https.html
/client-hints/accept_ch_lifetime_cross_origin_iframe.tentative.sub.https.html
/client-hints/accept_ch_lifetime_same_origin_iframe.tentative.https.html
/client-hints/accept_ch_lifetime_subresource.tentative.https.html
/client-hints/accept_ch_malformed_header.https.html
/client-hints/http_equiv_accept_ch.tentative.http.html
/client-hints/http_equiv_accept_ch.tentative.https.html
/client-hints/http_equiv_accept_ch.tentative.sub.https.html
/client-hints/http_equiv_accept_ch_lifetime_cross_origin_iframe.tentative.sub.https.html
/client-hints/http_equiv_accept_ch_lifetime_same_origin_iframe.tentative.https.html
/client-hints/http_equiv_accept_ch_lifetime_subresource.tentative.https.html
/client-hints/http_equiv_accept_ch_malformed_header.tentative.https.html
/client-hints/image-with-dpr-header.html
/client-hints/sec-ch-ua.http.html
/client-hints/sec-ch-ua.https.html
/css/css-animations/AnimationEffect-getComputedTiming.tentative.html
/css/css-animations/CSSAnimation-animationName.tentative.html
/css/css-animations/CSSAnimation-canceling.tentative.html
/css/css-animations/CSSAnimation-effect.tentative.html
/css/css-animations/CSSAnimation-finished.tentative.html
/css/css-animations/CSSAnimation-getCurrentTime.tentative.html
/css/css-animations/CSSAnimation-id.tentative.html
/css/css-animations/CSSAnimation-pausing.tentative.html
/css/css-animations/CSSAnimation-playState.tentative.html
/css/css-animations/CSSAnimation-ready.tentative.html
/css/css-animations/CSSAnimation-startTime.tentative.html
/css/css-animations/CSSPseudoElement-getAnimations.tentative.html
/css/css-animations/Document-getAnimations.tentative.html
/css/css-animations/Element-getAnimations-dynamic-changes.tentative.html
/css/css-animations/Element-getAnimations.tentative.html
/css/css-animations/KeyframeEffect-getKeyframes.tentative.html
/css/css-animations/KeyframeEffect-target.tentative.html
/css/css-animations/animation-iteration-count-calc.html
/css/css-animations/animationevent-interface.html
/css/css-animations/animationevent-marker-pseudoelement.html
/css/css-animations/animationevent-pseudoelement.html
/css/css-animations/animationevent-types.html
/css/css-animations/computed-style-animation-parsing.html
/css/css-animations/event-dispatch.tentative.html
/css/css-animations/event-order.tentative.html
/css/css-animations/historical.html
/css/css-animations/idlharness.html
/css/css-animations/inheritance.html
/css/css-animations/pending-style-changes-001.html
/css/css-animations/style-animation-parsing.html
/css/css-text/overflow-wrap/overflow-wrap-anywhere-span-002.html
/css/css-text/overflow-wrap/overflow-wrap-break-word-span-002.html
/css/css-text/overflow-wrap/word-wrap-alias.html
/media-source/SourceBuffer-abort-readyState.html
/media-source/SourceBuffer-abort-removed.html
/media-source/SourceBuffer-abort.html
/media-source/URL-createObjectURL-null.html
/media-source/URL-createObjectURL-revoke.html
/media-source/URL-createObjectURL.html
/media-source/idlharness.any.worker.html
/media-source/idlharness.any.html
/media-source/mediasource-activesourcebuffers.html
/media-source/mediasource-addsourcebuffer-mode.html
/media-source/mediasource-addsourcebuffer.html
/media-source/mediasource-append-buffer.html
/media-source/mediasource-appendbuffer-quota-exceeded.html
/media-source/mediasource-appendwindow.html
/media-source/mediasource-attach-stops-delaying-load-event.html
/media-source/mediasource-avtracks.html
/media-source/mediasource-buffered.html
/media-source/mediasource-changetype-play.html
/media-source/mediasource-changetype.html
/media-source/mediasource-closed.html
/media-source/mediasource-config-change-mp4-av-framesize.html
/media-source/mediasource-config-change-mp4-av-video-bitrate.html
/media-source/mediasource-config-change-mp4-v-bitrate.html
/media-source/mediasource-config-change-mp4-v-framerate.html
/media-source/mediasource-config-change-mp4-v-framesize.html
/media-source/mediasource-config-change-webm-a-bitrate.html
/media-source/mediasource-config-change-webm-av-audio-bitrate.html
/media-source/mediasource-config-change-webm-av-framesize.html
/media-source/mediasource-config-change-webm-av-video-bitrate.html
/media-source/mediasource-config-change-webm-v-bitrate.html
/media-source/mediasource-config-change-webm-v-framerate.html
/media-source/mediasource-config-change-webm-v-framesize.html
/media-source/mediasource-detach.html
/media-source/mediasource-duration-boundaryconditions.html
/media-source/mediasource-endofstream-invaliderror.html
/media-source/mediasource-endofstream.html
/media-source/mediasource-errors.html
/media-source/mediasource-getvideoplaybackquality.html
/media-source/mediasource-invalid-codec.html
/media-source/mediasource-is-type-supported.html
/media-source/mediasource-liveseekable.html
/media-source/mediasource-multiple-attach.html
/media-source/mediasource-play-then-seek-back.html
/media-source/mediasource-play.html
/media-source/mediasource-preload.html
/media-source/mediasource-remove.html
/media-source/mediasource-removesourcebuffer.html
/media-source/mediasource-seek-beyond-duration.html
/media-source/mediasource-seek-during-pending-seek.html
/media-source/mediasource-seekable.html
/media-source/mediasource-sequencemode-append-buffer.html
/media-source/mediasource-sourcebuffer-mode-timestamps.html
/media-source/mediasource-sourcebuffer-mode.html
/media-source/mediasource-sourcebuffer-trackdefaults.html
/media-source/mediasource-sourcebufferlist.html
/media-source/mediasource-timestamp-offset.html
/media-source/mediasource-trackdefault.html
/media-source/mediasource-trackdefaultlist.html
/mixed-content/audio-tag/http-csp/same-host-https/top-level/no-redirect/allowed/allowed.https.html
/mixed-content/worklet-paint-data-import/no-opt-in/same-host-https/top-level/keep-scheme-redirect/allowed/allowed.https.html
/payment-method-basic-card/historical.https.html
/payment-method-basic-card/idlharness.window.html
/payment-method-basic-card/payment-request-canmakepayment-method.https.html
/referrer-policy/no-referrer-when-downgrade/meta-referrer/cross-origin/http-http/a-tag/no-redirect/insecure-protocol.http.html
/referrer-policy/no-referrer/meta-referrer/same-origin/http-http/script-tag/swap-origin-redirect/generic.http.html
/referrer-policy/origin/http-rp/cross-origin/http-https/iframe-tag/swap-origin-redirect/generic.http.html
/referrer-policy/same-origin/meta-referrer/same-origin/http-https/img-tag/swap-origin-redirect/same-origin-insecure.http.html
/referrer-policy/strict-origin-when-cross-origin/attr-referrer/same-origin/http-https/script-tag/swap-origin-redirect/upgrade-protocol.http.html
/referrer-policy/strict-origin/meta-referrer/cross-origin/http-https/img-tag/no-redirect/upgrade-protocol.http.html
/referrer-policy/unsafe-url/meta-referrer/same-origin/http-https/img-tag/no-redirect/generic.http.html
/referrer-policy/unset-referrer-policy/http-rp/cross-origin/http-http/img-tag/no-redirect/insecure-protocol.http.html
/referrer-policy/unset-referrer-policy/http-rp/same-origin/http-http/img-tag/swap-origin-redirect/insecure-protocol.http.html
/webaudio/the-audio-api/the-oscillatornode-interface/ctor-oscillator.html
/webaudio/the-audio-api/the-oscillatornode-interface/detune-limiting.html
```

(wpt11 ∩ wpt23) ∩ wpt71 = also the same 130 tests.

It would appear the tests that are causing a crash is one of the 130 listed.