SIGSEGV with nested finally in closure iterator

[arnetheduck]

Description

proc p(self: int) =
  iterator p_738197581(): int {.
      closure, gcsafe, raises: [].} =
    var closureSucceeded_738197580 = true
    try:
      yield 0
    finally:
      if closureSucceeded_738197580:
        discard

  var internalClosure: iterator(): int {.raises: [], gcsafe.} = p_738197581

  while true:
    discard internalClosure()
    if internalClosure.finished(): break

try:
  try:
    raise (ref ValueError)()
  finally:
    p(0)
except CatchableError:
  discard

Nim Version

1.6.18, devel 773c066

Current Output

testit.nim(25) testit
excpt.nim(648) signalHandler
excpt.nim(330) _ZN6system18rawWriteStackTraceE3varI6stringE
stacktraces.nim(59) _ZN11stacktraces30auxWriteStackTraceWithOverrideE3varI6stringE
SIGSEGV: Illegal storage access. (Attempt to read from nil?)

Expected Output

No response

Possible Solution

No response

Additional Information

No response