Hidden package hints no longer display

This started as a mailing list thread: https://mail.haskell.org/pipermail/haskell-cafe/2018-January/128485.html. Dan Burton demonstrated a reproduction without any build tool.

With GHC 8.0.2, when you try to use a module from a hidden package, you get an error message with a helpful hint to add the package to the build-depends. With GHC 8.2.2 (and I believe 8.2.1), it appears that this hint is no longer displayed. To demonstrate, I'll copy Dan's repro:

$ cat Main.hs
module Main where
import Data.Map
main = putStrLn "It compiles"

$ ghc-pkg list containers
/usr/local/Cellar/ghc/8.2.2/lib/ghc-8.2.2/package.conf.d
    containers-0.5.10.2

$ ghc --make -hide-all-packages -package base Main.hs
[1 of 1] Compiling Main             ( Main.hs, Main.o )

Main.hs:2:1: error:
    Could not find module ‘Data.Map’
    Use -v to see a list of the files searched for.
  |
2 | import Data.Map
  | ^^^^^^^^^^^^^^^

$ ghc --make -hide-all-packages -package base -package containers Main.hs
[1 of 1] Compiling Main             ( Main.hs, Main.o )
Linking Main ...

Trac metadata

Trac field	Value
Version	8.2.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture