rn_dup.hs:9:10: error: [GHC-29916]
    Multiple declarations of ‘MkT’
    Declared at: rn_dup.hs:7:16
                 rn_dup.hs:9:10

rn_dup.hs:9:10: error: [GHC-29916]
    Multiple declarations of ‘MkT’
    Declared at: rn_dup.hs:7:10
                 rn_dup.hs:9:10

rn_dup.hs:11:27: error: [GHC-85524]
    Duplicate field name ‘rf’ in record declaration

rn_dup.hs:12:16: error: [GHC-29916]
    Multiple declarations of ‘rf’
    Declared at: rn_dup.hs:11:27
                 rn_dup.hs:12:16

rn_dup.hs:17:3: error: [GHC-29916]
    Multiple declarations of ‘CT’
    Declared at: rn_dup.hs:15:3
                 rn_dup.hs:17:3

rn_dup.hs:18:3: error: [GHC-29916]
    Multiple declarations of ‘f’
    Declared at: rn_dup.hs:16:3
                 rn_dup.hs:18:3