[GHC] #14969: panic on incorrect syntax

[GHC]

#14969: panic on incorrect syntax
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        Reporter:  johnleo           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.5
      Resolution:  fixed             |             Keywords:  TypedHoles
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  ghci/scripts/T14969
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by johnleo):

 The latest behavior using 8.5.20180413 on my Mac is that if I type `3 _ 4`
 or `3 _` GHCI now hangs, which I do not consider an improvement over the
 panic. I have to type `^C` to break. If I type something like `_` or `_ 3`
 I get a `Found hole` message as expected.

 Reopening, but if it makes more sense to file a new bug instead I can do
 that.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14969#comment:9>
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