[Issue 15891] Compiler error when std.algorithm.cache and std.algorithm.joiner and map composed

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https://issues.dlang.org/show_bug.cgi?id=15891

berni44 <bugzi...@d-ecke.de> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzi...@d-ecke.de

--- Comment #2 from berni44 <bugzi...@d-ecke.de> ---
reduced example:

```
import std.algorithm; 

void main()
{
    [1].map!(x=>[x].map!(y=>y)).cache;
}
```

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