Bug report about Function implicitly return type 'any'. #18100
Description
TypeScript Version: 2.4.2
Code
// A *self-contained* demonstration of the problem follows...
// Test this by running `tsc` on the command-line, rather than through another build tool such as Gulp, Webpack, etc.
/*!
*
* Copyright 2017 - acrazing
*
* @author acrazing joking.young@gmail.com
* @since 2017-08-29 10:20:21
* @version 1.0.0
* @desc index.ts
*/
export function create<T>(data: T): T {
return data
}
export const direct = create({ hello: 'world' })
console.log(direct.hello)
export function implicit<T extends Function>(argv: T): T & { __data: true } {
return argv as any
}
export const func = () => create({ hello: 'world' })
export const a = implicit(func)
console.log(a)
export const b = implicit(() => create({ hello: 'implict' }))
console.log(b)Expected behavior: No Error
Actual behavior:
�[100;30m29�[0m export const b = implicit(() => create({ hello: 'implict' }))
�[100;30m �[0m �[91m ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~�[0m
index.ts(29,27): �[91merror�[0m TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
Extra Information
The code work fine with typescript@2.3.4, generated d.ts file code as follow:
/*!
*
* Copyright 2017 - acrazing
*
* @author acrazing joking.young@gmail.com
* @since 2017-08-29 10:20:21
* @version 1.0.0
* @desc index.ts
*/
export declare function create<T>(data: T): T;
export declare const direct: {
hello: string;
};
export declare function implicit<T extends Function>(argv: T): T & {
__data: true;
};
export declare const func: () => {
hello: string;
};
export declare const a: (() => {
hello: string;
}) & {
__data: true;
};
export declare const b: (() => any) & {
__data: true;
};And more, the tsc output error information should not include color information if the stdout is not a TTY. The error information above is copied by tsc | pbcopy, the output contains colors.