🚨 Error: undefined is not an object (evaluating 'c.ampdoc')

ampprojectbot commented 3 years ago

Details

Error report: link First seen: Jul 23, 2020 Frequency: ~ 1,152/day

Stacktrace

Error: undefined is not an object (evaluating 'c.ampdoc')
    at ampdoc (src/multidoc-manager.js:516:11)
    at extensions/amp-next-page/1.0/page.js:193:11
    at extensions/amp-next-page/1.0/service.js:411:13
    at hidePreviousPages_ (extensions/amp-next-page/1.0/service.js:344:8)
    at extensions/amp-next-page/1.0/service.js:335:24
    at extensions/amp-next-page/1.0/service.js:542:8
    at relativePos (extensions/amp-next-page/1.0/visibility-observer.js:310:29)
    at topSentinelPositionChanged_ (extensions/amp-next-page/1.0/visibility-observer.js:93:8)
    at position (src/service/position-observer/position-observer-worker.js:109:20)

Notes

@wassgha modified src/multidoc-manager.js:491-532 in #25629 (Dec 10, 2019) @wassgha modified extensions/amp-next-page/1.0/page.js:184-193 in #26296 (Jan 23, 2020) @wassgha modified extensions/amp-next-page/1.0/service.js:410-411 in #26296 (Jan 23, 2020) @wassgha modified extensions/amp-next-page/1.0/service.js:344-345 in #26296 (Jan 23, 2020) @wassgha modified extensions/amp-next-page/1.0/service.js:328-335 in #25636 (Dec 10, 2019) @wassgha modified extensions/amp-next-page/1.0/service.js:541-545 in #26296 (Jan 23, 2020) @wassgha modified extensions/amp-next-page/1.0/visibility-observer.js:294-381 in #26778 (Apr 9, 2020) @wassgha modified extensions/amp-next-page/1.0/visibility-observer.js:93-93 in #26778 (Apr 9, 2020) @zhouyx modified src/service/position-observer/position-observer-worker.js:106-136 in #10813 (Sep 8, 2017)