memo001 causes compile time panic with fails with -O -dannot-lint

$ cd libraries/base/tests; ghc-stage2 memo001.hs -O -dannot-lint
[1 of 2] Compiling Memo1            ( Memo1.lhs, Memo1.o ) [Optimisation flags changed]
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 8.7.20181116 for x86_64-unknown-linux):
        idInfo
  val_a3pf
  Call stack:
      CallStack (from HasCallStack):
        callStackDoc, called at compiler/utils/Outputable.hs:1160:37 in ghc:Outputable
        pprPanic, called at compiler/basicTypes/Var.hs:567:34 in ghc:Var

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

Trac metadata

Trac field	Value
Version	8.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture