[GHC] #15617: Unboxed tuples/sum error message on `a = show 5` in expression evaluation and interactive modes

[GHC]

#15617: Unboxed tuples/sum error message on `a = show 5` in expression evaluation
and interactive modes
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        Reporter:  ChaiTRex          |                Owner:
                                     |  JulianLeviston
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.6.1-beta1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by JulianLeviston):

 Right. It sounds like refactoring is a good idea for this. In terms of
 `HscTarget`, it feels like `HscInterpreted` is possibly not named
 correctly? The other three seem like actual targets: `HscC`, `HscAsm`,
 `HscLlvm`.

 That is, how can "Interpreted" be a target? A target is the resultant
 output of a process. `Interpreted` is a method of obtaining a target. That
 is, the others seems like target languages (C, assembly, LLVM bytecode).
 What is `Interpreted` in that context? is it trying to say Haskell
 Bytecode? (I'm not even sure what that *is*).

 This is just according to my current understanding of what's going on,
 which is pretty shallow.

 On the other hand, DynFlags already seems quite large. Is it the right
 place to determine what mode the compiler is in? I'd be guided by others'
 advice here because I'm so green.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15617#comment:10>
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