Comparing Enumerations across package boundary behaves weird.

[Nathan Mentley]

I apologize if my misunderstanding is causing a false bug report.

I'm working on a simple cli library: (https://github.com/nathanmentley/emoji-cli)
Semi similar to an overly simplified clone the golang library Cobra (https://github.com/spf13/cobra)

In my package I'm defining this enum for error codes:

📗 ✋ enum <- A collection of error codes. 📗
🌍 🦃 ✋ 🍇
  🔘🤦 💭 Couldn't execute a command
  🔘🙎 💭 No command passed
  🔘🛑 💭 Missing Required Parameter
🍉

If I throw ✋🛑 in my library package

I'm able to catch it and correctly compare it to see the correct error message when doing the compare in the package:

🌍 🐇 🚂 🍇
  ...
  🔓 ❗️ ⚕ error ✋ 🍇
    😀🔤An error occurred.🔤❗️

    ↪️ error 🙌 🆕✋🤦❗️ 🍇
      😀🔤For an unknown reason the command could not be executed.🔤❗️
    🍉
    ↪️ error 🙌 🆕✋🙎❗️ 🍇
      😀🔤Command not found.🔤❗️
    🍉
    ↪️ error 🙌 🆕✋🛑❗️ 🍇
      😀🔤A required parameter is missing from the command. See help for more details.🔤❗️
    🍉
  🍉
🍉

📦 clihelper 🐍
🏁 ➡️ 🔢 🍇
  💭 Build app object.
  🆕 🔶🐍🚂 🆕❗️ ➡️  app
  ...
  💭 Execute the app.
  🥑 ret 🏃 app ❗️ 🍇
    ↩️ ret
  🍉
  🙅 error 🍇
    💭 Optionally use the built in error handling.
    ⚕ app error ❗️
    ↩️ -1
  🍉
🍉

But if I do the compare outside of the package:

📦 clihelper 🐍
🏁 ➡️ 🔢 🍇
  ...
  💭 Execute the app.
  🥑 ret 🏃 app ❗️ 🍇
    ↩️ ret
  🍉
  🙅 error 🍇
    💭 Use custom error handling
    ↪️ error 🙌 🆕🔶🐍✋🤦❗️ 🍇
      😀🔤For an unknown reason the command could not be executed.🔤❗️
    🍉
    ↪️ error 🙌 🆕🔶🐍✋🙎❗️ 🍇
      😀🔤Command not found.🔤❗️
    🍉
    ↪️ error 🙌 🆕🔶🐍✋🛑❗️ 🍇
      😀🔤A required parameter is missing from the command. See help for more details.🔤❗️
    🍉
    ↩️ -1
  🍉
🍉

The wrong error error message display. Because ✋🛑 🙌🔶🐍✋🤦 is evaluating to true.

I have a fork of the emojicode repo. I'd be willing to hack on it and make a pull request if this is in fact a bug. I just want to make sure I'm not misunderstanding something here.

Thanks.

[Nathan Mentley]

You can see this issue in action by in the example/bug-report-emojicode-issue-123 branch of this repo: https://github.com/nathanmentley/emoji-cli/

Once cloned you can run:

yarn example echo -e "test message"
to see the example project running correctly

running:

yarn example echo

I'd expect it to print the "A required parameter is missing from the command. See help for more details." message, but instead it prints the wrong message "For an unknown reason the command could not be executed."

If you checkout the master branch of that repo it does this error handling / message printing inside the library package and works correctly.

[thbwd]

The issue was caused by a bug in the Prettyprinter, which is also responsible for generating the interface file. Moreover, your package caused a flow control bug to surface, which was also the reason for any LLVM warnings, you might have seen.

Very interesting project, by the way!