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cryptol v2.11.0 Release Notes

  • Language changes

    • The newtype construct, which has existed in the interpreter in an incomplete and undocumented form for quite a while, is now fullly supported. The construct is documented in section 1.22 of Programming Cryptol. Note, however, that the cryptol-remote-api RPC server currently does not include full support for referring to newtype names, though it can work with implementations that use newtype internally.

    🆕 New features

    • 0️⃣ By default, the interpreter will now track source locations of expressions being evaluated, and retain call stack information. This information is incorporated into error messages arising from runtime errors. This additional bookkeeping incurs significant runtime overhead, but may be disabled using the --no-call-stacks command-line option.

    • The :exhaust command now works for floating-point types and the :check command now uses more representative sampling of floating-point input values to test.

    • The cryptol-remote-api RPC server now has methods corresponding to the :prove and :sat commands in the REPL.

    • The cryptol-eval-server executable is a new, stateless server providing a subset of the functionality of cryptol-remote-api dedicated entirely to invoking Cryptol functions on concrete inputs.

    Internal changes

    • A single running instance of the SMT solver used for type checking (Z3) is now used to check a larger number of type correctness queries. This means that fewer solver instances are invoked, and type checking should generally be faster.

    • 🏗 The Cryptol interpreter now builds against libBF version 0.6, which fixes a few bugs in the evaluation of floating-point operations.

    🐛 Bug fixes

    • Closed issues #118, #398, #426, #470, #491, #567, #594, #639, #656, #698, #743, #810, #858, #870, #905, #915, #917, #962, #973, #975, #980, #984, #986, #990, #996, #997, #1002, #1006, #1009, #1012, #1024, #1030, #1035, #1036, #1039, #1040, #1044, #1045, #1049, #1050, #1051, #1052, #1063, #1092, #1093, #1094, and #1100.