[GHC] #15108: Panic: collectNBinders

[GHC]

#15108: Panic: collectNBinders
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        Reporter:  cdisselkoen       |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Profiling         |              Version:  8.4.2
      Resolution:  fixed             |             Keywords:  panic
                                     |  collectNBinders
Operating System:  Linux             |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nomeata):

 Have you considered adding
 {{{
   | JoinNonRec v [v] (Expr v)
   | JoinRec [(v, [v], Expr v)]
 }}}
 to `Bind v`? It seems that a great lot of code has to zoom past the
 binders of a join point, causing bugs. With these constructors, one would
 be forced to handle them properly – and code that does not need to pay
 attention can use a pattern synonym that recreates the original view.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15108#comment:10>
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