Failed to parse warning - [{:<, 1}, {:_ 1}, {:atom_part, 1, 'c'} ...

[sascha-wolf]

Environment

Elixir: 1.8.1 (OTP 20)
Erlang: 21.3.3

Dialyxir: 1.0.0-rc.7 (also reproducible on master - 50eb422)

Error

[{:<, 1}, {:_, 1}, {:atom_part, 1, 'c'}, {:atom_part, 1, 'o'}, {:atom_part, 1, 'n'}, {:atom_part, 1, 'n'}, {:atom_part, 1, '@'}, {:int, 1, 1}, {:",", 1}, {:"{", 1}, {:atom_full, 1, '\'error\''}, {:",", 1}, {:"<<", 1}, {:int, 1, 70}, {:":", 1}, {:int, 1, 8}, {:atom_part, 1, '/'}, {:atom_part, 1, 'i'}, {:atom_part, 1, 'n'}, {:atom_part, 1, 't'}, {:atom_part, 1, 'e'}, {:atom_part, 1, 'g'}, {:atom_part, 1, 'e'}, {:atom_part, 1, 'r'}, {:atom_part, 1, '-'}, {:atom_part, 1, 'u'}, {:atom_part, 1, 'n'}, {:atom_part, 1, 'i'}, {:atom_part, 1, 't'}, {:":", 1}, {:int, 1, 1}, {:",", 1}, {:int, 1, 97}, {:":", 1}, {:int, 1, 8}, {:atom_part, 1, '/'}, {:atom_part, 1, 'i'}, {:atom_part, 1, 'n'}, {:atom_part, 1, 't'}, {:atom_part, 1, 'e'}, {:atom_part, 1, 'g'}, {:atom_part, 1, 'e'}, {:atom_part, 1, 'r'}, {:atom_part, 1, '-'}, {:atom_part, 1, 'u'}, {:atom_part, 1, 'n'}, {:atom_part, 1, 'i'}, {:atom_part, 1, ...}, {:":", ...}, {...}, ...]

Legacy warning:

lib/my_project/controllers/my_controller.ex:69: The pattern <_conn@1, {'error', <<70:8/integer-unit:1,97:8/integer-unit:1,105:8/integer-unit:1,108:8/integer-unit:1,101:8/integer-unit:1,100:8/integer-unit:1,32:8/integer-unit:1,116:8/integer-unit:1,111:8/integer-unit:1,32:8/integer-unit:1,105:8/integer-unit:1,110:8/integer-unit:1,116:8/integer-unit:1,101:8/integer-unit:1,114:8/integer-unit:1,112:8/integer-unit:1,114:8/integer-unit:1,101:8/integer-unit:1,116:8/integer-unit:1,32:8/integer-unit:1,97:8/integer-unit:1,110:8/integer-unit:1,115:8/integer-unit:1,119:8/integer-unit:1,101:8/integer-unit:1,114:8/integer-unit:1,32:8/integer-unit:1,102:8/integer-unit:1,114:8/integer-unit:1,111:8/integer-unit:1,109:8/integer-unit:1,32:8/integer-unit:1,66:8/integer-unit:1,79:8/integer-unit:1,82:8/integer-unit:1,71:8/integer-unit:1,46:8/integer-unit:1>>}> can never match the type <_,{'error',atom() | [any(),...] | #{'__exception__':=_, '__struct__':='Elixir.Redix.ConnectionError' | 'Elixir.Redix.Error', 'message'=>binary(), 'reason'=>atom()}}>

mix dialyzer --format raw

{:warn_matching, {'lib/my_project/controllers/my_controller.ex', 69}, {:pattern_match, ['pattern <_conn@1, {\'error\', <<70:8/integer-unit:1,97:8/integer-unit:1,105:8/integer-unit:1,108:8/integer-unit:1,101:8/integer-unit:1,100:8/integer-unit:1,32:8/integer-unit:1,116:8/integer-unit:1,111:8/integer-unit:1,32:8/integer-unit:1,105:8/integer-unit:1,110:8/integer-unit:1,116:8/integer-unit:1,101:8/integer-unit:1,114:8/integer-unit:1,112:8/integer-unit:1,114:8/integer-unit:1,101:8/integer-unit:1,116:8/integer-unit:1,32:8/integer-unit:1,97:8/integer-unit:1,110:8/integer-unit:1,115:8/integer-unit:1,119:8/integer-unit:1,101:8/integer-unit:1,114:8/integer-unit:1,32:8/integer-unit:1,102:8/integer-unit:1,114:8/integer-unit:1,111:8/integer-unit:1,109:8/integer-unit:1,32:8/integer-unit:1,66:8/integer-unit:1,79:8/integer-unit:1,82:8/integer-unit:1,71:8/integer-unit:1,46:8/integer-unit:1>>}>', '<_,{\'error\',atom() | [any(),...] | \#{\'__exception__\':=_, \'__struct__\':=\'Elixir.Redix.ConnectionError\' | \'Elixir.Redix.Error\', \'message\'=>binary(), \'reason\'=>atom()}}>']}}