invalid type annotation. The left side of :: must be a variable, got: nil | message. Note "left | right :: ann" is the same as "(left | right) :: ann". To solve this, use parentheses around the union operands: "left | (right :: ann)"

OTP 25.x / Elixir 1.15.x

System.stacktrace/0 is deprecated. Use __STACKTRACE__ instead

OTP 25.x / Elixir 1.15.x

:sys.get_debug/3 is deprecated. Incorrectly documented and only for internal use. can often be replaced with sys:get_log/1

OTP 25.x / Elixir 1.15.x

do not use "length(errors) > 0" to check if a list is not empty since length always traverses the whole list. Prefer to pattern match on a non-empty list, such as [_ | _], or use "errors != []" as a guard

OTP 25.x / Elixir 1.15.x

module attribute @only was set but never used

OTP 25.x / Elixir 1.15.x

Application.get_env/2 is discouraged in the module body, use Application.compile_env/3 instead

OTP 25.x / Elixir 1.15.x

use Bitwise is deprecated. import Bitwise instead

OTP 25.x / Elixir 1.15.x

use Bitwise is deprecated. import Bitwise instead

OTP 25.x / Elixir 1.15.x

^^^ is deprecated. It is typically used as xor but it has the wrong precedence, use Bitwise.bxor/2 instead

OTP 25.x / Elixir 1.15.x

^^^ is deprecated. It is typically used as xor but it has the wrong precedence, use Bitwise.bxor/2 instead