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🚨 Error: Cannot read property 'toString' of undefined #70

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ampprojectbot opened this issue Mar 16, 2021 · 1 comment
Open

🚨 Error: Cannot read property 'toString' of undefined #70

ampprojectbot opened this issue Mar 16, 2021 · 1 comment

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@ampprojectbot
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Details

Error report: link
First seen: May 9, 2018
Frequency: ~ 351/day

Stacktrace

Error: Cannot read property 'toString' of undefined
    at toString (src/polyfills/custom-elements.js:99:30)

Notes

@jridgewell modified src/polyfills/custom-elements.js:90-102 in #17205 (Aug 3, 2018)

Seen in:

  • 03-06 Experiment-A (0631+2)
  • 03-12 Nightly (2145)

/cc @ampproject/release-on-duty
@rcebulko
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@calebcordry This seems to be occurring mostly in ExpA; could this be related to that experiment or
the recent PR that was cherry-picked?

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@rcebulko @ampprojectbot