Unable to debug a brand new Phoenix project

[superchris]

Environment

• Elixir & Erlang versions (elixir --version):
  Erlang/OTP 22 [erts-10.6.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
  Elixir 1.10.1 (compiled with Erlang/OTP 22)
• Operating system: Ubuntu running under WSL2
• Editor or IDE name (e.g. Emacs/VSCode): VSCode
• LSP Client name: ElixirLS Fork: Elixir support and debugger

Description

I created a brand new phoenix project and attempted to debug tests from VSCode using the default launch.json for mix test. Here's the output:

Started ElixirLS Fork debugger v0.3.2
Elixir version: "1.10.1 (compiled with Erlang/OTP 22)"
Erlang version: "22"
** Invalid beam file or no abstract code: 'Elixir.DebugTestWeb.PageControllerTest'
** Invalid beam file or no abstract code: 'Elixir.DebugTestWeb.ErrorViewTest'
** Invalid beam file or no abstract code: 'Elixir.DebugTestWeb.LayoutViewTest'
** Invalid beam file or no abstract code: 'Elixir.DebugTestWeb.PageViewTest'
(Debugger) Task failed because an exception was raised:
** (UndefinedFunctionError) function DebugTestWeb.PageViewTest.ex_unit/0 is undefined (module DebugTestWeb.PageViewTest is not available)
DebugTestWeb.PageViewTest.ex_unit()
(ex_unit 1.10.1) lib/ex_unit/runner.ex:118: ExUnit.Runner.run_module/2
13:37:16.898 [error] Process #PID<0.998.0> raised an exception
** (UndefinedFunctionError) function DebugTestWeb.PageViewTest.ex_unit/0 is undefined (module DebugTestWeb.PageViewTest is not available)
DebugTestWeb.PageViewTest.ex_unit()
(ex_unit 1.10.1) lib/ex_unit/runner.ex:118: ExUnit.Runner.run_module/2
13:37:16.899 [error] GenServer #PID<0.994.0> terminating
** (UndefinedFunctionError) function DebugTestWeb.PageViewTest.ex_unit/0 is undefined (module DebugTestWeb.PageViewTest is not available)
DebugTestWeb.PageViewTest.ex_unit()
(ex_unit 1.10.1) lib/ex_unit/runner.ex:118: ExUnit.Runner.run_module/2
Last message: {:EXIT, #PID<0.988.0>, {:undef, [{DebugTestWeb.PageViewTest, :ex_unit, [], []}, {ExUnit.Runner, :run_module, 2, [file: 'lib/ex_unit/runner.ex', line: 118]}]}}

[superchris]

I didn't catch that this was already a known issue. For others that might chance upon this, I was able to install elixir from master (1.11.0-dev) using asdf and the debugger worked for me.

[axelson]

Glad you figured it out! For reference here is the other issue: #158