Error TS2320 when interface extends interface that has optional member and another interface that has same named required member · Issue #3598 · microsoft/TypeScript · GitHub

I have 3 interfaces: interface A { member1: string; } interface B { member1?: string; } interface C extends A, B { } I'm getting TS2320: [Object Object] error, because interface A's member1 is required property, and B's membe

The types when inherit from Error? · Issue #32617 · microsoft/TypeScript · GitHub

Can wrongly assign object with incomplete mapped type to interface with mapped type member · Issue #29190 · microsoft/TypeScript · GitHub

TypeScript 4.0 causes unsolvable TS2611 error for properties inherited from a mixin · Issue #41347 · microsoft/TypeScript · GitHub

instanceof is broken when class extends Error type · Issue #13965 · microsoft/TypeScript · GitHub

Regression in 4.9: semantic error TS2312 appears for some interface setups · Issue #51559 · microsoft/TypeScript · GitHub

The types when inherit from Error? · Issue #32617 · microsoft/TypeScript · GitHub

instanceof is broken when class extends Error type · Issue #13965 · microsoft/TypeScript · GitHub

TypeScript 4.0 causes unsolvable TS2611 error for properties inherited from a mixin · Issue #41347 · microsoft/TypeScript · GitHub

Allow extending multiple interfaces with different, but compatible types · Issue #16936 · microsoft/TypeScript · GitHub

Foo' is not assignable to 'Partial' where generic 'T extends Foo' · Issue #19467 · microsoft/TypeScript · GitHub