[Issue 17138] Warn about superfluous "with" statements

[via Digitalmars-d-bugs]

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

--- Comment #5 from Eyal <eyal at weka.io> ---
Another case that is beneficial and should not be an error:

If the expression results in an object that scopes over the block and has a
destructor. 

Example:

with(someMutex.acquired) {

  // No use of any fields from the MutexAcquired object

} // dtor of MutexAcquired called here, releasing the mutex

So here you'd want no error either.

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