chunkBy bug?

[Seb]

On Saturday, 5 September 2020 at 03:30:33 UTC, JG wrote:
> The following code won't compile:
> ----
> import std.algorithm;
> import std.range;
> import std.stdio;
>
> void main() {
>  auto v = [2,4,8,3,6,9,1,5,7];
>  foreach(i; 2..4) {
>   writeln(v.myChunkBy!((a,b)=>a%i==b%i));
>  }
> }
> ----
> /opt/local/include/phobos/std/algorithm/iteration.d(2009): 
> Error: function tmp.main.ChunkByImpl!(__lambda1, 
> int[]).ChunkByImpl.Group.popFront cannot access frame of 
> function D main
> ----
>
> Is this expected behavior?

No.

> I can get it to run as expected by modifying the source of 
> chunkBy as follows:

It's hard to read this and compare against the original 
implementation here.
If this issue still persists with master, why don't you simply 
open a PR for Phobos?
Bug fixes are always welcome!