debug deadlock #988

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 25.x)	18s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	9m 29s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	9m 41s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	7m 59s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	2m 27s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	9m 55s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	2m 15s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	2m 12s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	8m 30s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	7m 55s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	8m 49s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	11m 42s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	7m 59s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	4m 24s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	11m 38s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	4m 40s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	5m 13s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	4m 57s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	4m 16s
	2h 4m 19s

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