"lookup_final_id" panic (out of scope type application + deferred type errors)

The following program panics GHCi 8.10-rc1 (ghc-8.10.0.20200123):

{-# LANGUAGE TypeApplications #-}
{-# OPTIONS_GHC -fdefer-type-errors #-}

module Bug where

class C a where
  m :: a

instance C Bool where
  m = notInScope @Word

Bug.hs:10:7: warning: [-Wdeferred-out-of-scope-variables]
    Variable not in scope: notInScope
   |
10 |   m = notInScope @Word
   |       ^^^^^^^^^^
ghc.exe: panic! (the 'impossible' happened)
  (GHC version 8.10.0.20200123:
        lookup_final_id
  $fCBool
  Call stack:
      CallStack (from HasCallStack):
        callStackDoc, called at compiler\utils\Outputable.hs:1179:37 in ghc:Outputable
        pprPanic, called at compiler\\main\\TidyPgm.hs:201:12 in ghc:TidyPgm