🚨 Error: null is not an object (evaluating 'a.length')

[ampprojectbot]

Details

Error report: link
First seen: May 6, 2020
Frequency: ~ 25,834/day

Stacktrace

Error: null is not an object (evaluating 'a.length')
    at url (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/url-expander/expander.js:75:9)
    at url (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/url-replacements-impl.js:897:21)
    at hrefWithVars (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/extensions/amp-social-share/0.1/amp-social-share.js:142:22)
    at https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/custom-element.js:1153:39
    at fn (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/utils/promise.js:75:12)
    at resolve (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/utils/promise.js:74:22)
    at https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/custom-element.js:1153:33
    at https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/resource.js:908:18
    at state (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/vsync-impl.js:470:25)
    at tasks (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/vsync-impl.js:426:18)
    at https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/pass.js:109:4
    at https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/pass.js:55:6
    at callback (https://raw.githubusercontent.com/ampproject/amphtml/2005050322000/src/service/timer-impl.js:83:8)

Notes

@calebcordry modified src/service/url-expander/expander.js:75-75 in #12682 (Jan 20, 2018)
@rsimha modified src/service/url-replacements-impl.js:896-897 in #21212 (May 16, 2019)
@caroqliu modified extensions/amp-social-share/0.1/amp-social-share.js:141-160 in #28100 (Apr 30, 2020)
@jridgewell modified src/utils/promise.js:75-78 in #15143 (May 8, 2018)
@renovate-bot modified src/utils/promise.js:74-74 in #27350 (Mar 30, 2020)
@jridgewell modified src/service/vsync-impl.js:470-471 in #20836 (Feb 14, 2019)
@cramforce modified src/service/timer-impl.js:81-88 in #7363 (Feb 7, 2017)

Seen in:

• 05-05 Experimental (0322)

Possible assignees: @caroqliu, @jridgewell

/cc @ampproject/release-on-duty

[rcebulko]

Closing as a dupe of #28260
(separate errors likely created because of how different browsers report the error)