GHC crash instead of compile error on GHC 8.2 with ApplicativeDo

I'm filing this a sa proxy for user sam2_ from IRC:

$ cat Bug.hs
{-# LANGUAGE ApplicativeDo #-}
module Bug where

doc = do
  () <- a
  () <- b
  c' <- c
  return d

$ ghc-8.2.1 Bug.hs
[1 of 1] Compiling Bug              ( Bug.hs, Bug.o )
ghc: out of memory (requested 1048576 bytes)

$ ghc-8.0.2 Bug.hs
[1 of 1] Compiling Bug              ( Bug.hs, Bug.o )

Bug.hs:5:9: error: Variable not in scope: a :: f ()

Bug.hs:6:9: error: Variable not in scope: b :: f ()

Bug.hs:7:9: error: Variable not in scope: c :: f a0

Bug.hs:8:10: error: Variable not in scope: d

Trac metadata

Trac field	Value
Version	8.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	nh2
Operating system
Architecture