JSON parse error when running dap-debug

[siraben]

Describe the bug I'm unable to start a debug session with dap-mode, after running M-x dap-debug I get the following message.

error in process filter: End of file while parsing JSON: "premature end of input", "<string>", 1, 1024, 1024 [2 times]

To Reproduce M-x dap-debug

Version

[LSP Dart] 1.17.11 (package: 20201206.1725) at 2021.01.08 @ Emacs 28.0.50
[Dart SDK] Dart SDK version: 2.10.4 (stable) (Wed Nov 11 13:35:58 2020 +0100) on "macos_x64"

[ericdallo]

@siraben did you run dap-dart-setup before?

[siraben]

@ericdallo yes.

[siraben]

It was working before but has stopped working, not sure why.

[ericdallo]

Ok, maybe some flutter/dart update broke that, could you M-x toggle-debug-on-error and reproduce the issue again, then paste the stacktrace here?

[siraben]

Weird, I ran M-x toggle-debug-on-error then M-x dap-debug, but no stacktrace was produced.

[ericdallo]

Probably because is not a elisp raw error, it's from parsing the json on dap buffer, @yyoncho do you know how to debug that?

[yyoncho]

Might be similar to https://github.com/emacs-lsp/lsp-mode/issues/2375 What you can do is to wrap the debugger and see what exactly it is receiving.

[siraben]

Might be similar to https://github.com/emacs-lsp/lsp-mode/issues/2375 What you can do is to wrap the debugger and see what exactly it is receiving.

How would I wrap the debugger?

[zheylmun]

Did you ever get anywhere with this @siraben? I'm seeing the same error and am also not clear on how to wrap the debugger as @yyoncho suggests.

[siraben]

@zheylmun I have not programmed in Dart for a while so haven't tested the issue.

[ericdallo]

Could you both test with latest lsp-dart released this week and confirm this is still happening?

[jvliwanag]

Might be similar to what I reported here - https://github.com/emacs-lsp/lsp-dart/issues/163#issuecomment-1169519435

[ericdallo]

This should be fixed after https://github.com/emacs-lsp/lsp-dart/pull/165