[GHC] #15633: Type-checker plugins aren't loaded in 8.6.1

[GHC]

#15633: Type-checker plugins aren't loaded in 8.6.1
-------------------------------------+-------------------------------------
           Reporter:  phadej         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.6.1-beta1
           Keywords:                 |  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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 Type-Checker plugins seem to work in GHCi-8.4.3
 https://gist.github.com/phadej/f2040eba327a88d3652cda021403f97f

 However with GHC-8.6.1

 The Glorious Glasgow Haskell Compilation System, version 8.6.0.20180907
 76a233143f1ec940f342ce3ce3afaf306923b392 (which seems to be the last
 commit in 8.6 branch atm)

 the plugins aren't loaded.

 {{{
 % ghci-8.6.1 -fplugin=ThereIsNoPlugin
 GHCi, version 8.6.0.20180907: http://www.haskell.org/ghc/  :? for help
 Loaded GHCi configuration from /home/ogre/.ghci
 λ>
 }}}

 starts a session without a warning. 8.4.3 however fails:

 {{{
 % ghci-8.4.3 -fplugin=ThereIsNoPlugin
 GHCi, version 8.4.3: http://www.haskell.org/ghc/  :? for help
 <command line>: Could not find module ‘ThereIsNoPlugin’
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15633>
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