Record partial application in Haskell

Record.hs

> data Thing = Thing {a :: Int, b :: Int, c :: Int} deriving Show
> :t
Thing :: Int -> Int -> Int -> Thing
> Thing {a = 10}

<interactive>:13:1: Warning:
    Fields of ‘Thing’ not initialised: b, c
    In the expression: Thing {a = 10}
    In an equation for ‘it’: it = Thing {a = 10}

<interactive>:13:1: Warning:
    Fields of ‘Thing’ not initialised: b, c
    In the expression: Thing {a = 10}
    In an equation for ‘it’: it = Thing {a = 10}
Thing {a = 10, b = *** Exception: <interactive>:13:1-14: Missing field in record construction Ghci4.b

> Thing {c = 10} {a = 5} {b = 2}

<interactive>:14:1: Warning:
    Fields of ‘Thing’ not initialised: a, b
    In the expression: Thing {c = 10}
    In the expression: (Thing {c = 10}) {a = 5}
    In the expression: ((Thing {c = 10}) {a = 5}) {b = 2}

<interactive>:14:1: Warning:
    Fields of ‘Thing’ not initialised: a, b
    In the expression: Thing {c = 10}
    In the expression: (Thing {c = 10}) {a = 5}
    In the expression: ((Thing {c = 10}) {a = 5}) {b = 2}
Thing {a = 5, b = 2, c = 10}