[Pkg-javascript-devel] typescript regression

[Xavier]

Hi,

while trying to build node-rxjs, I noticed that after typescript update,
build fails with some:

  src/internal/Subscription.ts(98,9): error TS2349: This expression is
   not callable.
  Each member of the union type '(<T>(arg: {} | T) => arg is T extends
   readonly any[] ? unknown extends T ? never : readonly any[] : any[])
   | (<T>(x: any) => x is T[])' has signatures, but

Is there a known breaking thing between 4.0.5 and 4.1.2 ?