Crash in AST specifier

[lukaszsamson]

Env:
Erlang/OTP 25 [erts-13.1.1] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit:ns]
Elixir 1.14.2 (compiled with Erlang/OTP 25)
gradient version:
a9f1be9

Cannot load tokens: {:error, :enoent}
Cannot load tokens: {:error, :enoent}
Cannot load tokens: {:error, :enoent}
Cannot load tokens: {:error, :enoent}
Cannot load tokens: {:error, :enoent}
** (MatchError) no match of right hand side value: :error
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:451: Gradient.AstSpecifier.spec_mapper/3
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:69: Gradient.AstSpecifier.context_mapper_map/4
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:96: Gradient.AstSpecifier.mapper/3
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:82: Gradient.AstSpecifier.context_mapper_fold/4
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:83: Gradient.AstSpecifier.context_mapper_fold/4
    (gradient 0.1.0) lib/gradient/ast_specifier.ex:53: Gradient.AstSpecifier.run_mappers/2
    (gradient 0.1.0) lib/gradient.ex:70: Gradient.handle_elixir_ast/2
    (elixir 1.14.2) lib/enum.ex:1658: Enum."-map/2-lists^map/1-0-"/2
    (elixir 1.14.2) lib/stream.ex:612: anonymous fn/4 in Stream.map/2
    (elixir 1.14.2) lib/enum.ex:4751: Enumerable.List.reduce/3
    (elixir 1.14.2) lib/stream.ex:1811: Enumerable.Stream.do_each/4
    (elixir 1.14.2) lib/stream.ex:1051: Stream.do_transform_inner_enum/7
    (elixir 1.14.2) lib/enum.ex:4307: Enum.reverse/1
    (elixir 1.14.2) lib/enum.ex:3646: Enum.to_list/1
    (gradient 0.1.0) lib/mix/tasks/gradient.ex:107: Mix.Tasks.Gradient.execute/2
    (gradient 0.1.0) lib/mix/tasks/gradient.ex:98: Mix.Tasks.Gradient.run/1
    (mix 1.14.2) lib/mix/task.ex:421: anonymous fn/3 in Mix.Task.run_task/4
    (mix 1.14.2) lib/mix/cli.ex:84: Mix.CLI.run_task/2

[erszcz]

Could you attach the code leading to this? A snippet or a link to a repo is fine, too.

[lukaszsamson]

I cannot share the repo but I'll try to isolate it

[lukaszsamson]

@erszcz What's the easiest way to see what file lead to that crash?

[erszcz]

@lukaszsamson Ahh, sorry, I missed that question. mix gradient --verbose should provide a verbose log which will tell the module being checked along with some relevant logs:

18:58:56 erszcz @ x6 : ~/work/elixir-lsp/elixir-ls (gradient *%)
$ mix gradient --verbose > gradient.log
18:59:06 erszcz @ x6 : ~/work/elixir-lsp/elixir-ls (gradient *%)
$ grep "Checking module" gradient.log | head -5
Checking module 'Elixir.ElixirLS.Debugger.Binding'
Checking module 'Elixir.ElixirLS.Debugger.BreakpointCondition'
Checking module 'Elixir.ElixirLS.Debugger.CLI'
Checking module 'Elixir.ElixirLS.Debugger.Completions'
Checking module 'Elixir.ElixirLS.Debugger.Output'

On a crash, the last printed Checking module ... should tell what module was the source of the crash.

[luk-pau-es]

Hello,
@lukaszsamson I have investigated the issue, with the version of gradient you have specified.
Could you update the dependency to the newest version and check again?

I have used elixir-lsp/elixir-ls repo for testing, and with the version you specified there are indeed the errors you reported. They are not present with the newest gradient version. Could you verify that?