`Warning: =destroy (dest.value) can raise an unlisted exception: Exception [Effect]` displayed when running README's example

[fukusuket]

Hello, I would like to thank you for maintaining the project.

Describe the issue I would like to report this because a WARNING was output when I executed the README below. https://github.com/Araq/malebolgia?tab=readme-ov-file#mutable-parameters-and-data-sharing

Step to Reproduce

1. nimble init
2. Copy https://github.com/Araq/malebolgia?tab=readme-ov-file#mutable-parameters-and-data-sharing example code
3. nimble build

Expected behaviour WARNING is not output.

Actual behaviour WARNING is output as follows.

% nimble build 
  Verifying dependencies for Sample@0.1.0
     Info:  Dependency on malebolgia@any version already satisfied
  Verifying dependencies for malebolgia@0.1.0
   Building Sample/Sample using c backend
/Users/admin/Scripts/Nim/Sample/src/Sample.nim(15, 4) template/generic instantiation of `awaitAll` from here
/Users/admin/.nimble/pkgs2/malebolgia-0.1.0-5c404addea46d485f94915a897fba9906feff92d/malebolgia.nim(244, 5) template/generic instantiation of `checkBody` from here
/Users/admin/Scripts/Nim/Sample/src/Sample.nim(16, 6) template/generic instantiation of `spawn` from here
/Users/admin/.nimble/pkgs2/malebolgia-0.1.0-5c404addea46d485f94915a897fba9906feff92d/malebolgia.nim(177, 47) template/generic instantiation of `toTask` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/tasks.nim(132, 20) template/generic instantiation of `isolate` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(37, 14) template/generic instantiation of `=destroy` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(27, 6) template/generic instantiation from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(29, 13) Warning: `=destroy`(dest.value) can raise an unlisted exception: Exception [Effect]
/Users/admin/Scripts/Nim/Sample/src/Sample.nim(15, 4) template/generic instantiation of `awaitAll` from here
/Users/admin/.nimble/pkgs2/malebolgia-0.1.0-5c404addea46d485f94915a897fba9906feff92d/malebolgia.nim(244, 5) template/generic instantiation of `checkBody` from here
/Users/admin/Scripts/Nim/Sample/src/Sample.nim(16, 6) template/generic instantiation of `spawn` from here
/Users/admin/.nimble/pkgs2/malebolgia-0.1.0-5c404addea46d485f94915a897fba9906feff92d/malebolgia.nim(177, 47) template/generic instantiation of `toTask` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/tasks.nim(132, 20) template/generic instantiation of `isolate` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(37, 14) template/generic instantiation of `=destroy` from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(27, 6) template/generic instantiation from here
/Users/admin/.choosenim/toolchains/nim-2.0.2/lib/std/isolation.nim(29, 13) Warning: `=destroy`(dest.value) can raise an unlisted exception: Exception [Effect]

Environment

• OS: macOS Sonoma version 14.2.1
• Nim: Compiler Version 2.0.2 [MacOSX: amd64]
• nimble: v0.14.2 compiled at 2023-12-24 13:54:41

Additional context A similar issue has been reported with Nim. Is this an issue on Nim's side?

• https://github.com/nim-lang/Nim/issues/23129

Sorry for my lack of understanding, but if this issue is scheduled to be resolved in Nim, I will close this issue.

[fukusuket]

In our project, we were using threadpool, so we are considering moving to malebolgia. https://nim-lang.org/docs/threadpool.html

Deprecated: use the nimble packages malebolgia, taskpools or weave instead

[ringabout]

It was fixed in the devel branch. You might use the devel compiler before the fix is backported to stable

[Araq]

It is a Nim issue not a Malebolgia issue. Thanks for using Malebolgia!

[fukusuket]

Thank you so much for your prompt reply! We look forward to the next release!🙂