Async `finally` swallows errors when it contains an `await` wrapped by `try/except`

[nitely]

Description

The following code should fail with an AssertionDefect error, but it does not.

import std/asyncdispatch

proc errval {.async.} =
  raise newException(ValueError, "err")
  
proc err {.async.} =
  try:
    doAssert false
  finally:
    echo "finally"
    # removing the following code will propagate the AssertionDefect
    try:
      await errval()
    except ValueError:
      echo "valueError"

proc main {.async.} =
  let errFut = err()
  await errFut

waitFor main()

Nim Version

Nim Compiler Version 2.1.1 [Linux: amd64]
Compiled at 2024-05-11
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: c91b33a
active boot switches: -d:release

Current Output

finally
valueError

Expected Output

finally
valueError
[AssertionDefect]

Possible Solution

No response

Additional Information

No response

[yglukhov]

Fixed in #25030