Backpack nameModule panic

The following variation on the bkpreex01 test causes a panic:

unit t23080-unit1 where
  signature H1 where
    data T
unit t23080-unit2 where
  dependency t23080-unit1[H1=<H2>]
  module B where
    data T = MkT
  signature H2(T(MkT)) where
    import B

λ ghc --backpack T23080.bkp
[1 of 2] Processing t23080-unit1
  [1 of 1] Compiling H1[sig]          ( t23080-unit1\H1.hsig, nothing )
[2 of 2] Processing t23080-unit2
  [1 of 3] Compiling B                ( t23080-unit2\B.hs, nothing )
  [2 of 3] Compiling H2[sig]          ( t23080-unit2\H2.hsig, nothing )

<no location info>: error:
    panic! (the 'impossible' happened)
  GHC version 9.4.4:
        nameModule
  internal MkT_02y
  Call stack:
      CallStack (from HasCallStack):
        callStackDoc, called at compiler\GHC\Utils\Panic.hs:182:37 in ghc:GHC.Utils.Panic
        pprPanic, called at compiler\GHC\Types\Name.hs:325:3 in ghc:GHC.Types.Name

Please report this as a GHC bug:  https://www.haskell.org/ghc/reportabug

The issue has to do with the export of the data constructor MkT from H2... changing the export to T(..) makes the panic go away.