[GHC] #11682: :main doesn't use a bound thread

5 Mar 2016

      #11682: :main doesn't use a bound thread
-------------------------------------+-------------------------------------
           Reporter:  dmwit          |             Owner:
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           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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 Here is a short program:

 {{{
 import Control.Concurrent
 main = do
   bound <- isCurrentThreadBound
   print (bound == rtsSupportsBoundThreads)
 }}}

 When compiled (with or without {{{-threaded}}}), it prints {{{True}}}.
 When executed via {{{runhaskell}}} or via ghci's {{{:main}}} command, it
 prints {{{False}}}.

 It would be nicer if it printed {{{True}}} in all of these cases, in
 particular to ease interactive development of GUI code and the like.

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11682
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