[GHC] #15594: --abi-hash with Backpack incorrectly loads modules from dependent packages

[GHC]

#15594: --abi-hash with Backpack incorrectly loads modules from dependent packages
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           Reporter:  ezyang         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:  backpack       |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Repro at: https://github.com/alexbiehl/cabal-backpack-register-
 repro/blob/master/src/Lib.hs

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15594>
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