using generics in param initializers gives `undeclared identifier`

[timotheecour]

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using generics in param initializers gives undeclared identifier

Example

  # Error: undeclared identifier: 'T'
  proc fun1[T](a: T, b = default(T)) = discard
  fun1(1, 2)

  # ditto
  proc foo2(T: typedesc): auto = 0
  proc fun2[T](a: T, b = foo2(T)) = discard
  fun2(1, 2)

  # ditto
  proc foo3[T](): auto = 0
  proc fun3[T](a: T, b = foo3[T]()) = discard
  fun3(1, 2)

  # this one works
  type Foo4[T] = T
  proc fun4[T](a: T, b: Foo4[T]) = discard
  fun4(1, 2)

Current Output

Error: undeclared identifier: 'T'

Expected Output

should work

Additional Information

• Your Nim version (output of nim -v). latest devel c0d240b8cd3dc08d25c671b0dc7614fbfa980c2e
• A link to a related issue or discussion. this is definitely related to https://github.com/nim-lang/Nim/issues/8551 but I'm hesitant to call it a duplicate: this one is for parameter initializers, the other one was for proc return type. Also, the examples given here are much simpler and should just work.