Panic due to missing Field/Round instances in cryptol-verifier

[brianhuffman]

sawscript> {{ recip : Rational -> Rational }}
saw: You have encountered a bug in cryptol-verifier's implementation.
*** Please create an issue at https://github.com/GaloisInc/cryptol-verifier/issues

%< ---------------------------------------------------
  Revision:  54a754c0de22f00c580c2d4835ada906ed5be9eb
  Branch:    update-cryptol (uncommited files present)
  Location:  proveProp
  Message:   Field Rational
CallStack (from HasCallStack):
  panic, called at src/Verifier/SAW/Cryptol/Panic.hs:13:9 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol.Panic
  panic, called at src/Verifier/SAW/Cryptol.hs:555:17 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol
  proveProp, called at src/Verifier/SAW/Cryptol.hs:844:23 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol
%< ---------------------------------------------------

sawscript> {{ roundAway : Rational -> Integer }}
saw: You have encountered a bug in cryptol-verifier's implementation.
*** Please create an issue at https://github.com/GaloisInc/cryptol-verifier/issues

%< ---------------------------------------------------
  Revision:  54a754c0de22f00c580c2d4835ada906ed5be9eb
  Branch:    update-cryptol (uncommited files present)
  Location:  proveProp
  Message:   Round Rational
CallStack (from HasCallStack):
  panic, called at src/Verifier/SAW/Cryptol/Panic.hs:13:9 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol.Panic
  panic, called at src/Verifier/SAW/Cryptol.hs:555:17 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol
  proveProp, called at src/Verifier/SAW/Cryptol.hs:844:23 in cryptol-verifier-0.1-Ls5lX129NPzJfQFRDA1ukY:Verifier.SAW.Cryptol
%< ---------------------------------------------------

[brianhuffman]

This was fixed in #804 when saw-script incorporated GaloisInc/cryptol-verifier#30. The cryptol-saw-core translator now implements those missing class dictionaries.