False positive for unnecessary parentheses

[ghost]

Code:

static bool isString(object o) {
	if (!(o is string s)) return false;
	return true;
}

Expected: No error.
Actual: Program.cs(5,8): warning SA1119: Statement must not use unnecessary parenthesis

[sharwell]

This appears to be a duplicate of #2372, which was fixed for the 1.1.0-beta004 release. If you are using this release (or newer) and still encounter the behavior, please reopen this issue.