bug#46819: 28.0.50; Undesireable warning: Empty let body from the `benchmark-run' implementation

[Stefan Monnier]

> It might be hard to fix in the general case.  Think about this example:
>
> (let (...)
>   (some-macro blah))
>
> What if that macro expands to nothing,

No can do.  A macro call has to expand to exactly one expression (that
expression can be nil, but it's still one expression).


        Stefan