[GHC] #10672: checkProddableBlock crash during Template Haskell linking

[GHC]

#10672: checkProddableBlock crash during Template Haskell linking
-------------------------------------+-------------------------------------
        Reporter:  lukexi            |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  high              |               Milestone:  7.10.3
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #9297 #10563      |  Differential Revisions:
  #8237 #9907                        |
-------------------------------------+-------------------------------------

Comment (by lukexi):

 To anyone else bitten by this:

 While this is figured out, I'm just stripping out all uses of Template
 Haskell in my software since I'm only using it for generating lenses.

 I put up a simple preprocessor here to do that during the build phase
 https://github.com/lukexi/strip-ths, designed to work with stack or cabal.

 (this workaround works because, as I mention in the README for the repro,

 > Everything also works [...] if I just call cabal exec -- ghc
 app/Main.hs. This is presumably because GHC doesn't try to link cxxylib
 when it is just compiling the Template Haskell splices, whereas Cabal asks
 it to.
 )

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10672#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler