Etherpad-lite: UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'colorId' of null

[ddeenniiss]

We have a lot of error like this.

[2019-05-31 14:51:16.994] [ERROR] console - (node:10107) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'colorId' of null
at p.then.authorInfo (/home/etherpad/public/etherpad/src/node/handler/PadMessageHandler.js:1199:37)
at process._tickCallback (internal/process/next_tick.js:68:7)
[2019-05-31 14:51:16.995] [ERROR] console - (node:10107) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
[2019-05-31 14:51:16.996] [ERROR] console - (node:10107) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[mixotroph]

[2019-07-11 20:40:05.168] [ERROR] console - (node:194) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 39)

[muxator]

Not working on it right now, but confirmed.

[xshadow]

I can confirm this is still a bug in 1.8.0, which is occurring a lot.

[muxator]

Fixed via a workaround in #3719.

The underlying bug still remains, but instead of a unhandled promise rejection, we'll get clear warning messages and a fallback to predefined values.