Unexpected aggressive-promise-polyfill error on dbwtester

This has come up in some smoketests recently…

It’s entirely clear where it’s from. Seems to only happen on ToT.

Me and @brendankenny can repro locally:

My repro:

• get chromium ToT
• open http://localhost:10200/dobetterweb/dbw_tester.html in it
• use ‘pause on caught exceptions’ carefully to find the cascade of exceptions that leads to TypeError: the given value is not a Promise

there’s a lot of unknowns here…

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I’m going to bypass the error temporarily in https://github.com/GoogleChrome/lighthouse/pull/11799

[paulirish]

This error seems to also turn into a crash.

When there’s a crash there’s a 'Inspector.targetCrashetevent, but it's logged in verbose. After that, LH tries "Page appears to be hung, killing JavaScript..." and soon after we see aPROTOCOL_TIMEOUTw/Emulation.setScriptExecutionDisabled`. (what happened in the w/o JS removal PR: https://github.com/GoogleChrome/lighthouse/runs/1534292951 )

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I bisected the crash on chromium…

python2.7 bisect_builds.py --use-local-cache -o -a mac -g 89.0.4343.0 -b 89.0.4351.0 --  --disable-features=TranslateUI --disable-extensions --disable-component-extensions-with-background-pages --disable-background-networking --disable-sync --metrics-recording-only --disable-default-apps --mute-audio --no-default-browser-check --no-first-run --disable-backgrounding-occluded-windows --disable-renderer-backgrounding --disable-background-timer-throttling --force-fieldtrials="*BackgroundTracing/default/" --remote-debugging-port=55027 --user-data-dir=/var/folders/py/rf3cszrn5kdbj_2w2jd_8wsc003dq2/T/lighthouse.XXXXXXX.qOGcKFSb --enable-logging --v=0

node lighthouse-cli/index.js http://localhost:10200/dobetterweb/dbw_tester.html -port=55027 --config-path=blahblahah

You are probably looking for a change made after 835252 (known good), but no later than 835253 (first known bad). CHANGELOG URL: The script might not always return single CL as suspect as some perf builds might get missing due to failure. https://chromium.googlesource.com/chromium/src/+log/56d85fa5f642954381267744e440faaa74814479..3904e0fe3b6a83c4aa22c960a28558612178870f

… @brendankenny called it. 😁

[paulirish]

fixed by #11836