GHC and iserv cannot agree on what an Integer is; insanity ensues

Tested off ghc-8.6.1-alpha1, running on macOS 10.13.5.

1. Compile a GHC that uses integer-gmp.

2. Compile a GHC that uses integer-simple.

3. Make Main.hs:

   {-# LANGUAGE TemplateHaskell #-}
   main = print $([e| 0 |])

4. Try to compile the file with integer-gmp ghc and integer-simple ghc-iserv.

   • Expected behavior: (compiles fine and executable prints 0) or (outputs to-the-point error message)

   • Actual:

     [1 of 1] Compiling Main             ( Main.hs, Main.o )
     
     Main.hs:2:14: error:
         • Exception when trying to run compile-time code:
             ghc: ghc-iserv terminated (-11)
           Code: [| 0 |]
         • In the untyped splice: $([| 0 |])
       |
     2 | main = print $([e| 0 |])
       |              ^^^^^^^^^^^

5. Try to compile the file with integer-simple ghc and integer-gmp ghc-iserv.

   • Expected behavior: (compiles fine and executable prints 0) or (outputs to-the-point error message)

   • Actual:

     [1 of 1] Compiling Main             ( Main.hs, Main.o )
     
     Main.hs:2:14: error:
         • Exception when trying to run compile-time code:
             heap overflow
           Code: [| 0 |]
         • In the untyped splice: $([| 0 |])
       |
     2 | main = print $([e| 0 |])
       |              ^^^^^^^^^^^

For more fun, replace the 0 with a 1. gmp ghc + simple iserv continues to explode. This is better than simple ghc + gmp iserv:

$ ./Main
283468057265
$ ./Main
283468057265
$ $simple_ghc -fexternal-interpreter -pgmi=$gmp_iserv Main.hs # again
# ...
$ ./Main
283468057105

Absolutely delicious. There is a similar situation for fractional literals.

It would be nice if there were at least a warning for situations like this.