tests/cases/compiler/constraintsThatReferenceOtherContstraints1.ts(3,14): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list. tests/cases/compiler/constraintsThatReferenceOtherContstraints1.ts(4,29): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list. ==== tests/cases/compiler/constraintsThatReferenceOtherContstraints1.ts (2 errors) ==== interface Object { } class Foo { } ~~~~~~~~~~~ !!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list. class Bar { ~~~~~~~~~~~ !!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list. data: Foo; // Error 1 Type 'Object' does not satisfy the constraint 'T' for type parameter 'U extends T'. } var x: Foo< { a: string }, { a: string; b: number }>; // Error 2 Type '{ a: string; b: number; }' does not satisfy the constraint 'T' for type