cannot recompile static files due to phoenix don't match plug/static.ex on serve_static

[equivalent]

Hi I am running Phoenix 1.3 on edge (from master). I've rebuild my Docker image (reputed master) and since then I'm getting:

[error] #PID<0.584.0> running Eq8.Web.Endpoint terminated
Server: localhost:4000 (http)
Request: GET /css/app.css
** (exit) an exception was raised:
    ** (Protocol.UndefinedError) protocol String.Chars not implemented for %{at: [], brotli?: false, et_cache: "public", et_generation: nil, from: {:eq8_web, "priv/static"}, gzip?: false, headers: %{}, only: ["css", "fonts", "images", "js", "favicon.ico", "robots.txt"], prefix: [], qs_cache: "public, max-age=31536000"}
        (elixir) lib/string/chars.ex:3: String.Chars.impl_for!/1
        (elixir) lib/string/chars.ex:17: String.Chars.to_string/1
        (elixir) lib/io.ex:533: IO.puts/2
        (plug) lib/plug/static.ex:195: Plug.Static.serve_static/4
        (eq8_web) lib/eq8_web/endpoint.ex:1: Eq8.Web.Endpoint.plug_builder_call/2
        (eq8_web) lib/plug/debugger.ex:123: Eq8.Web.Endpoint."call (overridable 3)"/2
        (eq8_web) lib/eq8_web/endpoint.ex:1: Eq8.Web.Endpoint.call/2
        (plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
        (cowboy) /app/deps/cowboy/src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4
[error] #PID<0.586.0> running Eq8.Web.Endpoint terminated
Server: localhost:4000 (http)
Request: GET /js/app.js
** (exit) an exception was raised:
    ** (Protocol.UndefinedError) protocol String.Chars not implemented for %{at: [], brotli?: false, et_cache: "public", et_generation: nil, from: {:eq8_web, "priv/static"}, gzip?: false, headers: %{}, only: ["css", "fonts", "images", "js", "favicon.ico", "robots.txt"], prefix: [], qs_cache: "public, max-age=31536000"}
        (elixir) lib/string/chars.ex:3: String.Chars.impl_for!/1
        (elixir) lib/string/chars.ex:17: String.Chars.to_string/1
        (elixir) lib/io.ex:533: IO.puts/2
        (plug) lib/plug/static.ex:195: Plug.Static.serve_static/4
        (eq8_web) lib/eq8_web/endpoint.ex:1: Eq8.Web.Endpoint.plug_builder_call/2
        (eq8_web) lib/plug/debugger.ex:123: Eq8.Web.Endpoint."call (overridable 3)"/2
        (eq8_web) lib/eq8_web/endpoint.ex:1: Eq8.Web.Endpoint.call/2
        (plug) lib/plug/adapters/cowboy/handler.ex:15: Plug.Adapters.Cowboy.Handler.upgrade/4
        (cowboy) /app/deps/cowboy/src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4

it seems that what is phoenix sending to static recompilation

%{at: [], brotli?: false, et_cache: "public", et_generation: nil,
  from: {:eq8_web, "priv/static"}, gzip?: false, headers: %{},
  only: ["css", "fonts", "images", "js", "favicon.ico", "robots.txt"],
  prefix: [], qs_cache: "public, max-age=31536000"}

doesnt match Plug.Static.serve_static

https://github.com/elixir-plug/plug/blob/master/lib/plug/static.ex#L193

It could be that my phoenix generated up don't match latest 1.3 rc (As I've generated umbrella app few weeks ago)

[josevalim]

Can you please provide the template information? We also need to know your Elixir version as well as your Plug version.

I suspect what happened is that you recompiled Plug but you did not recompile your Phoenix app. If you remove the _build directory and start from scratch, it should all work.

[josevalim]

Btw, we need to know your Plug version because the stacktrace you posted does not match the code in master. :)

[equivalent]

All hail the Great Jose :) , ... yes you were right rm -rf ./_build and then recompiling deps (mix deps.get && mix phx.server) done the trick. Thank you 🙏