Dialyxer/Dialyzer error on clean install

[the-destro]

Environment

• Elixir version (elixir -v):

Erlang/OTP 27 [erts-15.1.1] [source] [64-bit] [smp:11:11] [ds:11:11:10] [async-threads:1] [jit]

Elixir 1.17.3 (compiled with Erlang/OTP 27)

• Phoenix version (mix deps): phoenix 1.7.20
• Operating system: macOS 15.3.1

Actual behavior

Setup is here: https://github.com/the-destro/dialyzer_bug

I created a brand new project via mix phx.new dialyzer_bug --no-html --no-assets --no-dashboard --no-mailer --no-gettext and added dialyxer. I plain run of mix dialyzer outputs:

[:asn1, :bandit, :castore, :compiler, :crypto, :db_connection, :decimal, :dialyzer_bug, :dns_cluster, :ecto, :ecto_sql, :eex, :elixir, :hpax, :jason, :kernel, :logger, :mime, :phoenix, :phoenix_ecto, :phoenix_pubsub, :phoenix_template, :plug, :plug_crypto, :postgrex, :public_key, :runtime_tools, :ssl, :stdlib, :telemetry, :telemetry_metrics, :telemetry_poller, :thousand_island, :websock, :websock_adapter]
Looking up modules in dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Looking up modules in dialyxir_erlang-27.1.1_elixir-1.17.3.plt
Finding applications for dialyxir_erlang-27.1.1_elixir-1.17.3.plt
Finding modules for dialyxir_erlang-27.1.1_elixir-1.17.3.plt
Removing 5 modules from dialyxir_erlang-27.1.1_elixir-1.17.3.plt
Checking 468 modules in dialyxir_erlang-27.1.1_elixir-1.17.3.plt
Adding 5 modules to dialyxir_erlang-27.1.1_elixir-1.17.3.plt
done in 0m7.05s
Finding applications for dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Finding modules for dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Copying dialyxir_erlang-27.1.1_elixir-1.17.3.plt to dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Looking up modules in dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Checking 473 modules in dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
Adding 767 modules to dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt
done in 0m20.35s
No :ignore_warnings opt specified in mix.exs and default does not exist.

Starting Dialyzer
[
  check_plt: false,
  init_plt: ~c"~/code/phx_gens/dialyzer_bug/_build/dev/dialyxir_erlang-27.1.1_elixir-1.17.3_deps-dev.plt",
  files: [~c"~/code/phx_gens/dialyzer_bug/_build/dev/lib/dialyzer_bug/ebin/Elixir.DialyzerBug.Application.beam",
   ~c"~/code/phx_gens/dialyzer_bug/_build/dev/lib/dialyzer_bug/ebin/Elixir.DialyzerBug.Repo.beam",
   ~c"~/code/phx_gens/dialyzer_bug/_build/dev/lib/dialyzer_bug/ebin/Elixir.DialyzerBug.beam",
   ~c"~/code/phx_gens/dialyzer_bug/_build/dev/lib/dialyzer_bug/ebin/Elixir.DialyzerBugWeb.Endpoint.beam",
   ~c"~/code/phx_gens/dialyzer_bug/_build/dev/lib/dialyzer_bug/ebin/Elixir.DialyzerBugWeb.ErrorJSON.beam",
   ...],
  warnings: [:unknown]
]
Total errors: 1, Skipped: 0, Unnecessary Skips: 0
done in 0m1.17s
deps/phoenix/lib/phoenix/router.ex:1:pattern_match
The pattern can never match the type.

Pattern:
{_, _, _, _}

Type:
:error

________________________________________________________________________________
done (warnings were emitted)
Halting VM with exit status 2

Expected behavior

A clean dialyzer run