[GHC] #14076: cons operator for list give weird output

[GHC]

#14076: cons operator for list give weird output
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        Reporter:  AshHash           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.2.1
      Resolution:  invalid           |             Keywords:  cons(:)
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 > I reopen the ticket for a discussion

 There is no reason to reopen a ticket, just to have a discussion. The
 ticket is closed as invalid right now, and we are still having a
 discussion here. If the discussion comes to a conclusion that there is
 something to be done, then someone will change the status of the ticket
 accordingly.

 >  Maybe the error message needs to be improved?

 Which error message? He was observing

 {{{
 :t 1:2
 (Num [a], Num a) => [a]
 }}}

 which (rightly) does not produce any error message.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14076#comment:7>
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