-Wincomplete-patterns is affected by -g3

Program

module A where

data Z = A | B | C ()

data W = W ()

foo :: ()
foo = ()
  where
    partitionByWorkerSize worker_size pats = go pats [] []
      where
        go [] small warnings = (small, warnings)
        go (p:ps) small warnings
          | A <- worker_size p
          = go ps (p:small) warnings
          | B <- worker_size p
          = go ps small warnings
          | C name <- worker_size p
          = go ps small (W name : warnings)

This program doesn't warn normally but does with -g3

> ghc A.hs  -Wall -Wincomplete-patterns -fforce-recomp -g3
A.hs:12:9: warning: [GHC-62161] [-Wincomplete-patterns]
    Pattern match(es) are non-exhaustive
    In an equation for ‘go’:
        Patterns of type ‘[t]’, ‘[t]’, ‘[W]’ not matched: (_:_) _ _
   |
12 |         go [] small warnings = (small, warnings)
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...