[Issue 24078] [REG] crash related to concatenation

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24078

--- Comment #2 from Basile-z <b2.temp at gmx.com> ---
reduced w/o phobos

```
extern(C) int puts(const char*);

void main()
{
    auto a = ["c\0"];
    foreach (v; a ~ "a\0" ~ "b\0")
        puts(v.ptr);
}     
```

--