🚨 Error: Failed to execute 'animate' on 'Element': Partial keyframes are not supported.

[ampprojectbot]

Details

Error report: link
First seen: Jan 8, 2022
Frequency: ~ 243/day

Stacktrace

Error: Failed to execute 'animate' on 'Element': Partial keyframes are not supported.
    at animate (extensions/amp-animation/0.1/runners/native-web-animation-runner.js:72:36)
    at map (extensions/amp-animation/0.1/runners/native-web-animation-runner.js:67:35)
    at init (extensions/amp-animation/0.1/runners/native-web-animation-runner.js:97:11)
    at start (extensions/amp-story/1.0/animation.js:358:11)
    at startWhenReady_ (extensions/amp-story/1.0/animation.js:478:22)

Notes

@rsimha modified extensions/amp-animation/0.1/runners/native-web-animation-runner.js:72-73 in #23417 (Jul 19, 2019)
@renovate-bot modified extensions/amp-animation/0.1/runners/native-web-animation-runner.js:67-67 in #27350 (Mar 30, 2020)
@aghassemi modified extensions/amp-animation/0.1/runners/native-web-animation-runner.js:81-107 in #20831 (Feb 18, 2019)
@alanorozco modified extensions/amp-story/1.0/animation.js:358-358 in #12453 (Dec 18, 2017)
@rsimha modified extensions/amp-story/1.0/animation.js:477-480 in #21212 (May 16, 2019)

Seen in:

• 01-07 Nightly (1715)

Possible assignees: @rsimha, @aghassemi

/cc @ampproject/release-on-duty

[rcebulko]

@ampproject/wg-components This just started appearing in the latest Nightly release. It doesn't seem like any of the lines in the stack trace have been changed recently, so it's not obvious where this was introduced. Can one of y'all take a look at this?