[GHC] #14963: ghci -fdefer-type-errors can't run IO action from another module

[GHC]

#14963: ghci -fdefer-type-errors can't run IO action from another module
-------------------------------------+-------------------------------------
        Reporter:  elaforge          |                Owner:  tdammers
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.4.2
       Component:  GHCi              |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  ghci/should_run/T14963
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4833
       Wiki Page:                    |  Phab:D4830
-------------------------------------+-------------------------------------

Comment (by tdammers):

 Replying to [comment:36 simonpj]:
 > Let's not go overboard on this.  At the moment we are just implementing
 a workaround for a bug that we will fix.   Moreover the workaround is a
 one-line addition to Phab:D4830.  DO we need to do more?

 Oh, of course the proposal is not going to help with the issue at hand. I
 just noticed some unintuitive behavior, and a possible fix. If it's not
 deemed fix-worthy, then you'll never hear me about it again.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14963#comment:37>
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