[GHC] #13723: Recover gracefully from simplifier tick exhaustion

[GHC]

#13723: Recover gracefully from simplifier tick exhaustion
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 Currently if the limit is exceeded we stop.  It would be better if, when
 the limit was exceeded we refrained from doing the relevant
 transformation.

 That opens up a new debugging mechanism.  If you get a Lint error you can
 binary-chop your way to exactly the transformation that introduced it.

 But it does impose a cost; every transformation needs a conditional, and a
 code-path for not doing the transformation.   We'd need to check what perf
 impact this had.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13723#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler