Can't get filter_args: false to work

[joshuap]

I've been trying to test out the feature where method arguments are included in the stack trace (see filter_args config option), but can't make it work. What am I doing wrong?

Steps to Reproduce

1. Bootstrap a new Phoenix app

# https://hexdocs.pm/phoenix/installation.html
# https://hexdocs.pm/phoenix/up_and_running.html
mix archive.install hex phx_new 1.5.9
mix phx.new hello
cd hello
mix ecto.create
mix phx.server
# or: iex -S mix phx.server

2. Install honeybadger package

defp deps do
  [{:honeybadger, "~> 0.12"}]
end

3. Configure honeybadger in config/config.exs

config :honeybadger,
  api_key: "project API key",
  environment_name: :prod,
  use_logger: false,
  filter_args: false

4. Add Honeybadger Plug to lib/hello_web/router.ex

defmodule HelloWeb.Router do
  use HelloWeb, :router
  use Honeybadger.Plug

  # ...
end

5. Edit lib/hello_web/controllers/page_controller.ex

defmodule HelloWeb.PageController do
  use HelloWeb, :controller
  
  def index(conn, _params) do
    # render(conn, "index.html")
    raise_error(conn, "random string")
  end
  
  defp raise_error(conn, string) do
    raise "test error"
  end
end

Result

No args:

I'm expecting to see something like: raise_error(%{ conn inspect output }, "random string")

[TraceyOnim]

@joshuap I have debugged the issue, here is the stack trace that I'm receiving from my phoenix app , which I'm suspecting is the same stack trace that honey badger might be receiving from your end.

{HelloWeb.PageController, :new,  2,
   [file: 'lib/hello_web/controllers/page_controller.ex', line: 8]}

In this case , the args is received as an integer which represents the arity of the function.
The format_args/2 which takes in the arg and filter_args will always match line backtrace.ex 56 returning an empty list hence not displaying the function with its argument i.e raise_error(%{ conn inspect output }, "random string")

[joshuap]

@TraceyOnim ah, I forgot that there are some known cases where the full arguments are not available. Here is some relevant info:

#115 (comment)
#123

I'll continue to track improvements to this feature in #123.

Thanks for double-checking!