captured NimNode becomes NilLit

[levovix0]

Description

macro foo(arg: int): int =
  proc impl(): NimNode = arg
  impl()

echo foo(11)

invalidly captures arg into impl

Nim Version

Nim Compiler Version 2.0.4 [Linux: amd64]
Compiled at 2024-03-28
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: b47747d
active boot switches: -d:release

Current Output

a.nim(5, 9) template/generic instantiation of `foo` from here
a.nim(3, 3) Error: type mismatch: got 'NimNode' for 'nil' but expected 'int'

Expected Output

11

Possible Solution

No response

Additional Information

after calling impl(), both impl().treeRepr and arg.treeRepr is NilLit

[metagn]

Related #3855, same issue #18352