Two different macros cause variable name conflict

[al6x]

The code below won't compile, because of redeclaration of the let a variable.

But if the second test template commented out it would work.

Example

playground

template test*(name: string, body) =
  block: body

template test*(name: string, group: string, body) =
  block: body

test "a1":
  let a = 1

test "a2":
  let a = 1

Current Output

Hint: used config file '/playground/nim/config/nim.cfg' [Conf]
Hint: used config file '/playground/nim/config/config.nims' [Conf]
....
/usercode/in.nim(8, 7) Hint: 'a' is declared but not used [XDeclaredButNotUsed]
/usercode/in.nim(11, 7) Error: redefinition of 'a'; previous declaration here: /usercode/in.nim(8, 7)

[metagn]

The body argument to the first template gets typechecked as there is an overload on it where there is a typed argument in the same place. I think your best option for now is to remove the : string annotation on group. To fix this Nim needs to alter its overload semantics in a case like this where it's obvious the arities don't match, but that might be unpredictable.

Late edit: This means this is another case of #14827