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tests/cases/compiler/genericWithOpenTypeParameters1.ts(7,40): error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
tests/cases/compiler/genericWithOpenTypeParameters1.ts(8,41): error TS2558: Expected 0 type arguments, but got 1.
tests/cases/compiler/genericWithOpenTypeParameters1.ts(9,41): error TS2558: Expected 0 type arguments, but got 1.
==== tests/cases/compiler/genericWithOpenTypeParameters1.ts (3 errors) ====
class B<T> {
foo(x: T): T { return null; }
}
var x: B<number>;
x.foo(1); // no error
var f = <T>(x: B<T>) => { return x.foo(1); } // error
~
!!! error TS2345: Argument of type 'number' is not assignable to parameter of type 'T'.
!!! error TS2345: 'T' could be instantiated with an arbitrary type which could be unrelated to 'number'.
var f2 = <T>(x: B<T>) => { return x.foo<T>(1); } // error
~
!!! error TS2558: Expected 0 type arguments, but got 1.
var f3 = <T>(x: B<T>) => { return x.foo<number>(1); } // error
~~~~~~
!!! error TS2558: Expected 0 type arguments, but got 1.
var f4 = (x: B<number>) => { return x.foo(1); } // no error
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