...dmd pull request #16724 "Fix bugzilla 23300 - std.array : array wrongly propagates scopeness o…" was...

...for std.array on scope InputRange" mentioning this issue:

- Bugzilla 23300 - add testcase for std...

...23300 - std.array : array wrongly propagates scopeness o…" fixing this issue:

- Fix bugzilla 23300 - std...

...with recent versions of LDC2:
```d
import std.typecons;
struct A{ int a,b,c...

...and some aren't, but code like std.algorithm needs to work with them either...

...old dmd for some reason:
```d
import std.typecons;
struct A{ int a,b,c...

Sorry, that should be O(log n) or better.

...overload, see ddoc: https://dlang.org/phobos/std_process.html#.pipeProcess

This needs to be...

...O(log n).

See `in` under *Operations* here:
https://dlang.org/phobos/std_container.html

...Which gets lowered to this:
```d
import std.typecons;
struct A{ int a,b,c...