🚨 Error: Cannot read property 'element' of undefined

[ampprojectbot]

Details

Error report: link
First seen: Jun 15, 2020
Frequency: ~ 1,148/day

Stacktrace

Error: Cannot read property 'element' of undefined
    at parentResource (src/service/owners-impl.js:151:16)
    at elements (src/service/owners-impl.js:150:4)
    at findResourcesInElements_ (src/service/owners-impl.js:98:4)
    at scheduleUnlayout (extensions/amp-list/0.1/amp-list.js:1073:12)
    at toArray (extensions/amp-list/0.1/amp-list.js:1072:10)
    at mutator (src/service/mutator-impl.js:233:8)
    at callback (src/service/vsync-impl.js:470:16)
    at callTask_ (src/service/vsync-impl.js:426:8)

Notes

@lannka modified src/service/owners-impl.js:151-188 in #24222 (Aug 30, 2019)
@renovate-bot modified src/service/owners-impl.js:150-150 in #27350 (Mar 30, 2020)
@renovate-bot modified src/service/owners-impl.js:98-98 in #27350 (Mar 30, 2020)
@powerivq modified src/service/mutator-impl.js:231-233 in #26638 (Feb 12, 2020)
@jridgewell modified src/service/vsync-impl.js:470-471 in #20836 (Feb 14, 2019)

Seen in:

• 06-13 Nightly (0233)

Possible assignees: @powerivq, @lannka

/cc @ampproject/release-on-duty

[zhouyx]

New error. @ampproject/wg-runtime could please take a look and set priority of the issue.

[rcebulko]

Note that this is a very high frequency for a Nightly error, given the small share of traffic it gets. If this reaches production, we'll see approx. 250k/day

[jridgewell]

We're aware, and UI team is working on a fix. /to @krdwan

[estherkim]

Note that this is a very high frequency for a Nightly error, given the small share of traffic it gets. If this reaches production, we'll see approx. 250k/day

Luckily this shouldn't reach beta this week; the beta candidate should be 2006112352000

[krdwan]

The fix is merged:
#28895

Thanks @jridgewell @caroqliu @zhouyx !