Compiler error when returning new iterator

[sonicsmooth]

Description

Sounds like this is related to #17632 .

Creating an iterator-that-calls-an-iterator yields compiler error Error: internal error: expr: var not init counter_520093758

iterator counter(frm, to: int): int {.closure.} =
  var x = frm
  while x < to:
    yield x
    x += 1


proc makeCounter(frm: int): iterator(to2: int): int {.closure.} =
  iterator(to2: int): int {.closure.} = 
    for x in counter(frm,to2):
      yield x

var ctr = makeCounter(2)
echo ctr(5)

Nim Version

Nim Compiler Version 2.2.0 [Windows: amd64]
Compiled at 2024-10-02

Current Output

c:\Users\Mikey\source\blocks\nim\tst.nim(11, 9) Error: internal error: expr: var not init counter_520093759
No stack traceback available
To create a stacktrace, rerun compilation with './koch temp c <file>', see https://nim-lang.github.io/Nim/intern.html#debugging-the-compiler for details

Expected Output

No compiler internal error.

Known Workarounds

I'm unable to apply any of the workarounds I've seen for this issue.
However changing proc to template seems to fix the problem:

Additional Information

No response