Pattern match(es) are non-exhaustive

[micwoj92]

Hello, compiling this package using ghc 9.2.8 I get following warnings:

[6 of 9] Compiling Doc              ( src/Doc.hs, dist/build/cab/cab-tmp/Doc.dyn_o )

src/Doc.hs:23:5: warning: [-Wincomplete-uni-patterns]
    Pattern match(es) are non-exhaustive
    In a pattern binding: Patterns of type ‘[String]’ not matched: []
   |
23 |     cmd:_ = commandNames cmdspec
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[7 of 9] Compiling Commands         ( src/Commands.hs, dist/build/cab/cab-tmp/Commands.dyn_o )
[8 of 9] Compiling Help             ( src/Help.hs, dist/build/cab/cab-tmp/Help.dyn_o )
[9 of 9] Compiling Main             ( src/Main.hs, dist/build/cab/cab-tmp/Main.dyn_o )

src/Main.hs:28:9: warning: [-Wincomplete-uni-patterns]
    Pattern match(es) are non-exhaustive
    In a pattern binding:
        Patterns of type ‘ParsedArgs’ not matched: Left _
   |
28 |     let Right (args,opts0) = pargs
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^

src/Main.hs:32:9: warning: [-Wincomplete-uni-patterns]
    Pattern match(es) are non-exhaustive
    In a pattern binding: Patterns of type ‘[Arg]’ not matched: []
   |
32 |         act:params = args
   |         ^^^^^^^^^^^^^^^^^

src/Main.hs:35:9: warning: [-Wincomplete-uni-patterns]
    Pattern match(es) are non-exhaustive
    In a pattern binding:
        Patterns of type ‘Maybe CommandSpec’ not matched: Nothing
   |
35 |     let Just cmdspec = mcmdspec
   |         ^^^^^^^^^^^^^^^^^^^^^^^
Linking dist/build/cab/cab ...