---
enum E { x }

void g(T)() { }

void main()
{
    with(E) g!int();
}
---

OPTLINK output:
---
OPTLINK (R) for Win32  Release 8.00.12
...
 Error 42: Symbol Undefined _D4main9__T1gTAiZ1gFNaNbNfAiZE4main1E
---

The source of such link failures is not just unexpected and hard to reduce. Worst of all one will likely think this is one of "unfixable" OPTLINK buffer overflow bugs making D unusable on Windows (or is it a cross-platform issue?).