875 – crash in glue.c line 700

Boiled down code shown below; I'm not sure how legal this syntax should be, but its enough to derail dmd. What I'm trying to do is specialize on two variadic type lists by wrapping them in tuples.
Thanks,
Kevin
-----
import std.traits;
int main(char[][] args)
{
 double bongos(int flux, char[] soup)
 {
 return 0.0;
 }
 
 auto foo = mk_future(& bongos, 99, "soup"[]);
 
 return 0;
}
int mk_future(A, B...)(A cmd, B args)
{
 typedef ReturnType!(A) TReturn;
 typedef ParameterTypeTuple!(A) TParams;
 typedef B TArgs;
 
 alias Foo!(TReturn, TParams, TArgs) TFoo;
 
 return 0;
}
class Foo(A, B, C) {
 this(A delegate(B), C)
 {
 }
}
-----
dmd -ofbasic basic.d
dmd: glue.c:700: virtual unsigned int Type::totym(): Assertion `0' failed.

Fixed DMD 1.005

Added to DStress as
http://dstress.kuehne.cn/run/b/bug_glue_700_A.d
http://dstress.kuehne.cn/run/b/bug_glue_700_B.d
http://dstress.kuehne.cn/run/b/bug_glue_700_C.d
http://dstress.kuehne.cn/run/b/bug_glue_700_D.d