[GHC] #10689: compiling singletons-1.1.2.1 as -O1 -fspec-constr fails as 'Template variable unbound in rewrite rule'

[GHC]

#10689: compiling singletons-1.1.2.1 as -O1 -fspec-constr fails as 'Template
variable unbound in rewrite rule'
-------------------------------------+-------------------------------------
        Reporter:  slyfox            |                   Owner:
            Type:  bug               |                  Status:  merge
        Priority:  high              |               Milestone:  7.10.3
       Component:  Compiler          |                 Version:  7.10.2-rc2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
                                     |  simplCore/should_compile/T10689,
                                     |  T10689a
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * testcase:   => simplCore/should_compile/T10689, T10689a
 * status:  new => merge


Comment:

 Fixed.

 We could merge to 7.10.3 I guess, so I'll set it to 'merge'.  It's not an
 entirely trivial fix, so I'm a bit inclined not to, though.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10689#comment:6>
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