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Unintentional bugfix?: Type parameters no longer assignable to unions with object and undefined in strict null checks #24013
Description
TypeScript Version: 2.9.0-dev.20180509
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Code
function f<T>(x: T) {
const y: object | null | undefined = x;
}in 2.8 with strictNullChecks on, this compiles (it does not when it is off). In very recent master, however, it is now an error (as it should be?):
While I think the error is certainly correct to issue, this change apparently breaks a handful of RWC tests, so is worth looking into.
Activity
weswigham commentedon May 15, 2018
Intentional fix by #23806, I just wasn't aware of it. 👍