🚨 Error: undefined is not an object (evaluating 'this.P.options')

Details
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**Error report:** [link](http://go/ampe/CP2Jzb_A0bbqOQ)
**First seen:** Dec 16, 2020
**Frequency:** ~ 817/day

Stacktrace
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Error: undefined is not an object (evaluating 'this.P.options')

    at kd (amp-date-picker-0.1.mjs:35:19247)

    at classList (src/custom-element.js:360:11)

    at src/custom-element.js:88:2

    at holder (src/service/extensions-impl.js:163:10)

    at src/service/custom-element-registry.js:52:4

    at src/style-installer.js:104:7

    at src/service/custom-element-registry.js:52:4

    at push (src/service/extensions-impl.js:410:24)

    at extensionId (src/service/extensions-impl.js:459:43)

    at docFactories (src/service/extensions-impl.js:410:11)

    at amp-date-picker-0.1.mjs:35:27405

    at f (amp-date-picker-0.1.mjs:35:46025)

    at getExtensionHolder_ (src/service/extensions-impl.js:190:20)

    at src/runtime.js:95:2

Notes
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`@dvoytenko` modified `src/custom-element.js:360-360` in #6766 (Dec 21, 2016)
`@jridgewell` modified `src/custom-element.js:86-88` in #27470 (Mar 30, 2020)
`@dvoytenko` modified `src/service/extensions-impl.js:156-179` in #4025 (Jul 15, 2016)
`@rsimha` modified `src/service/custom-element-registry.js:50-56` in #21212 (May 16, 2019)
`@rsimha` modified `src/style-installer.js:101-105` in #21212 (May 16, 2019)
`@rsimha` modified `src/service/custom-element-registry.js:50-56` in #21212 (May 16, 2019)
`@dvoytenko` modified `src/service/extensions-impl.js:409-411` in #4025 (Jul 15, 2016)
`@dvoytenko` modified `src/service/extensions-impl.js:457-461` in #29358 (Jul 20, 2020)
`@dvoytenko` modified `src/service/extensions-impl.js:409-411` in #4025 (Jul 15, 2016)
`@rsimha` modified `src/service/extensions-impl.js:186-192` in #21212 (May 16, 2019)
`@choumx` modified `src/runtime.js:95-95` in #10460 (Jul 17, 2017)

**Seen in:**
- 12-23 Beta (2217)
- 12-23 Experiment-A (2217)
- 12-23 Experimental (2217)
- 12-30 Nightly (1722)

**Possible assignees:** `@dvoytenko`, `@jridgewell`

/cc @ampproject/release-on-duty

Start with src/custom-element.js:360 and the surrounding stack entries in src/service/extensions-impl.js, src/service/custom-element-registry.js, src/style-installer.js, and src/runtime.js. Trace how amp-date-picker reaches the failing `this.P.options` access and look for an existing reproduction or relevant tests. Done means identifying the triggering lifecycle path and adding a regression test that prevents the reported error.

Written by the indexing model from the issue text.