tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceErrors.ts(3,31): error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'. tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceErrors.ts(7,35): error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => void'. Types of parameters 'x' and 'x' are incompatible. Type 'string' is not assignable to type 'number'. tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceErrors.ts(11,35): error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => void'. Types of parameters 'x' and 'x' are incompatible. Type 'string' is not assignable to type 'number'. tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceErrors.ts(15,41): error TS2345: Argument of type '(n: string) => string' is not assignable to parameter of type '(b: number) => number'. Types of parameters 'n' and 'b' are incompatible. Type 'string' is not assignable to type 'number'. ==== tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceErrors.ts (4 errors) ==== // Generic call with multiple type parameters and only one used in parameter type annotation function someGenerics1(n: T, m: number) { } someGenerics1(3, 4); // Error ~ !!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'string'. // 2 parameter generic call with argument 1 of type parameter type and argument 2 of function type whose parameter is of type parameter type function someGenerics4(n: T, f: (x: U) => void) { } someGenerics4('', (x: string) => ''); // Error ~~~~~~~~~~~~~~~~~ !!! error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => void'. !!! error TS2345: Types of parameters 'x' and 'x' are incompatible. !!! error TS2345: Type 'string' is not assignable to type 'number'. // 2 parameter generic call with argument 2 of type parameter type and argument 1 of function type whose parameter is of type parameter type function someGenerics5(n: T, f: (x: U) => void) { } someGenerics5('', (x: string) => ''); // Error ~~~~~~~~~~~~~~~~~ !!! error TS2345: Argument of type '(x: string) => string' is not assignable to parameter of type '(x: number) => void'. !!! error TS2345: Types of parameters 'x' and 'x' are incompatible. !!! error TS2345: Type 'string' is not assignable to type 'number'. // Generic call with multiple arguments of function types that each have parameters of the same generic type function someGenerics6(a: (a: A) => A, b: (b: A) => A, c: (c: A) => A) { } someGenerics6((n: number) => n, (n: string) => n, (n: number) => n); // Error ~~~~~~~~~~~~~~~~ !!! error TS2345: Argument of type '(n: string) => string' is not assignable to parameter of type '(b: number) => number'. !!! error TS2345: Types of parameters 'n' and 'b' are incompatible. !!! error TS2345: Type 'string' is not assignable to type 'number'.