Type mismatch on specialized alias type and template

[arnetheduck]

type
  X[A, B] = object
    a: A
    b: B

  Y[A] = X[A, int]

template s(T: type X): X = T()

template t[A, B](T: type X[A, B]): X[A, B] = T()

proc works1(): Y[int] = s(X[int, int])
proc works2(): Y[int] = t(X[int, int])
proc works3(): Y[int] = t(Y[int])

proc broken(): Y[int] = s(Y[int])

/home/arnetheduck/status/nim-beacon-chain/vendor/nim-eth/eth/keys/test.nim(16, 26) Error: type mismatch: got <type Y[system.int]>
but expected one of: 
template s(T: type X): X
  first type mismatch at position: 1
  required type for T: type X
  but expression 'Y[int]' is of type: type Y[system.int]

Nim Compiler Version 1.1.1 [Linux: amd64]
Compiled at 2020-03-29
Copyright (c) 2006-2020 by Andreas Rumpf

git hash: 8c719fce54544c8d14ce7c0e4639c974c1748668
active boot switches: -d:release