[aliasbug.d]

void foo() {};

void main()
{
  alias foo foo;
}

produces [dmd 0.96]:

aliasbug.d(5): alias foo recursive alias declaration
Assertion failure: 's != this' on line 267 in file 'declaration.c'

abnormal program termination

> [aliasbug.d]
>
> void foo() {};
>
> void main()
> {
>    alias foo foo;
> }
>
> produces [dmd 0.96]:
>
> aliasbug.d(5): alias foo recursive alias declaration
> Assertion failure: 's != this' on line 267 in file 'declaration.c'
>
> abnormal program termination

I just discovered another bug with aliases...

template T()
{
  void foo() { return 0; }
  alias foo foo;
}

mixin T;

void main()
{
  foo();
}

Compiler [0.97] goes into endless loop and does not respond.