[Issue 20309] Passing alias this with function returning chain to tempCString hangs up the program

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20309

berni44 <bugzilla at d-ecke.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzilla at d-ecke.de
          Component|phobos                      |dmd

--- Comment #1 from berni44 <bugzilla at d-ecke.de> ---
Reduced example:

```
import std.stdio;
import std.range : chain;

struct Test 
{
    auto filename() const { return chain("a", "b"); }
    alias filename this;
}

void main() 
{
    auto name = Test();
    writeln(name.front);
    name.popFront();
    writeln(name.front);
}
```

name.front and name.popFront always call filename(), which returns a new range
object... This is IMHO not a phobos bug.

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