TS2532 when class member assigned to local variable

[val-o]

TS version: 3.0.1

Hi, I have weird situation. The code below seems pretty simple to infer that myVar cannot be null or undefined, but I am still getting this error (TS2532). Is ts compiler not capable to do this yet?
Please ignore render and console being underlined red, those are tslint errors.
Thanks.
P.S. Sorry if this question was asked before, I look through all issues related to this error code.

[AlCalzone]

I don't recall the prior issues, but AFAIK typescript does not narrow based on the value of other variables. If you used

if (this.myVar) { ... }

you wouldn't get the error. I'm assuming this is a simplified repro, as you could always just remove the |null from the type declaration (after all, myVar is readonly).

[mattmccutchen]

AlCalzone is right. Duplicate of #24865.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.