[Issue 17138] Warn about superfluous "with" statements

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17138

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
Are you suggesting:

---
struct S {
    int field;
}

void foo(S s) {
    with (s)      // no error
        ++field;

    with (s)      // error
        ++s.field;
}
---

?

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