FStarLang/FStar

assert are never extracted even with `--mlish`

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#984 opened on Apr 13, 2017

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area/error-messagescomponent/extractiongood first issue

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Description

The function assert is never extracted to OCaml. This is not very nice when using the ocaml-based F* compiler and getting a Failure("Impossible") because an invariant was broken.

It would be nice to extract the assertions when they do correspond to runtime checks as they are in the compiler.

Contributor guide

Research direction
Investigate the F* compiler's extraction of assertions and identify why assert statements are not being extracted to OCaml when using mlish flag.
Tech stack
None
Domain
compilers
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitF* basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50