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tests/cases/compiler/typeParameterArgumentEquivalence5.ts(4,5): error TS2322: Type '() => (item: any) => T' is not assignable to type '() => (item: any) => U'.
Type '(item: any) => T' is not assignable to type '(item: any) => U'.
Type 'T' is not assignable to type 'U'.
tests/cases/compiler/typeParameterArgumentEquivalence5.ts(5,5): error TS2322: Type '() => (item: any) => U' is not assignable to type '() => (item: any) => T'.
Type '(item: any) => U' is not assignable to type '(item: any) => T'.
Type 'U' is not assignable to type 'T'.
==== tests/cases/compiler/typeParameterArgumentEquivalence5.ts (2 errors) ====
function foo<T,U>() {
var x: () => (item) => U;
var y: () => (item) => T;
x = y; // Should be an error
~
!!! error TS2322: Type '() => (item: any) => T' is not assignable to type '() => (item: any) => U'.
!!! error TS2322: Type '(item: any) => T' is not assignable to type '(item: any) => U'.
!!! error TS2322: Type 'T' is not assignable to type 'U'.
y = x; // Shound be an error
~
!!! error TS2322: Type '() => (item: any) => U' is not assignable to type '() => (item: any) => T'.
!!! error TS2322: Type '(item: any) => U' is not assignable to type '(item: any) => T'.
!!! error TS2322: Type 'U' is not assignable to type 'T'.
}
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