2.7.1 regression: method doesn't show up in intellisense

[gcanti]

TypeScript Version: 2.7.1 and typescript@next (2.8.0-dev.20180206)

Code

declare class Klass<A> {
  readonly value: A
  constructor(value: A)
  f<B extends number>(this: Klass<B>): void
}

const x = new Klass(1). // <= `f` is not suggested by intellisense

Expected behavior:

f should be listed in intellisense as happens with typescript v2.6.2

Actual behavior:

f doesn't show up in intellisense

Playground Link:

Playground repro

[DanielRosenwasser]

This is likely due to #20616.

[winterbe]

@DanielRosenwasser I've encountered a similar issue with my ts library Sequency. Code suggestions work fine in TS 2.6.1 but are incomplete in 2.7.1.

Please take a look at this declaration: https://github.com/winterbe/sequency/blob/master/src/Sequence.ts#L76-L91

Most operator functions are no longer available as suggestions. They all declare this: Sequence<T> via arguments (or with a more specific type parameter).

Tested in VSCode and Intellij IDEA (using typescript service): https://youtrack.jetbrains.com/issue/WEB-31141

2.6.1

2.7.1

[sant123]

Any advance on this topic? microsoft/vscode#43489

Just asking 😝