🚨 Error: Cannot read property 'src' of undefined

[ampprojectbot]

Details

Error report: link
First seen: May 16, 2020
Frequency: ~ 311/day

Stacktrace

Error: Cannot read property 'src' of undefined
    at scriptsInHead (src/service/extensions-impl.js:556:29)
    at Promise (src/runtime.js:300:11)
    at fnOrStruct (src/runtime.js:191:53)
    at src/service/standard-actions-impl.js:45:2

Notes

@jridgewell modified src/service/extensions-impl.js:555-556 in #28250 (May 7, 2020)
@erwinmombay modified src/runtime.js:298-303 in #16660 (Jul 18, 2018)
@peterjosling modified src/runtime.js:191-191 in #14922 (Apr 30, 2018)
@alanorozco modified src/service/standard-actions-impl.js:39-50 in #20687 (Feb 6, 2019)

Seen in:

• 05-15 Beta (0002)
• 05-15 Experimental (0002)

Possible assignees: @jridgewell, @alanorozco

/cc @ampproject/release-on-duty

[dreamofabear]

Bumping priority since this bug is breaking render of some ads that have duplicate extension scripts. Looking at the error reporter, seems like there are at least 5 distinct codepaths that trigger this.

Simple fix is to just soft-fail instead of unwinding the stack due to a runtime error.