FStarLang/karamel

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KaRaMeL is a tool for extracting low-level F* programs to readable C code

Stars: 519
Forks: 73
Open beginner issues: 0
Indexed issues: 53
Avg merge: 2h 58m
Merged PRs (30d): 1

Dominant language: OCaml
License: Apache-2.0
Last GitHub push: Aug 21, 2026
Latest indexed: Sep 16, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Open All

53 open issues indexed

[Easy] Enforce alignment of buffer allocation Open

FStarLang/karamel#23 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Easy] Implement 16-bit arithmetic (8-bit too) Open

FStarLang/karamel#24 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Easy] Figure out the business with Source.phrase in the library Open

FStarLang/karamel#28 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Easy] implement packed arrays of bools Open

FStarLang/karamel#29 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Compile buffers and structs which lengths are known to more precise types ? Open

enhancement

FStarLang/karamel#33 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Remove explicit casts from some integer constants, to improve readability Open

FStarLang/karamel#72 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Kremlib unverified notices Open

FStarLang/karamel#110 · 0 comments · 1 reaction · 1 assignee · Indexed Sep 16, 2026
Partial application for erased types, type parameters and implicits should be permitted when lowering to C Open

FStarLang/karamel#112 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
The last-minute desugaring of op_Bang_Star eliminates opportunities for prettier printing Open

FStarLang/karamel#116 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
UInt64 bug, possibly due to C coercion rules after a constant fold Open

FStarLang/karamel#117 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Redefined variables when branching on preprocessor flags Open

bug

FStarLang/karamel#151 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Remove default kremlin -ccopts Open

FStarLang/karamel#163 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Warning 8 is incorrect if the function is covered by static-header Open

FStarLang/karamel#165 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Kremlin inlining issue Open

FStarLang/karamel#171 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Unnecessary parameter renaming Open

FStarLang/karamel#172 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
WasmSupport.c:21: undefined reference to `WasmSupport_trap' Open

FStarLang/karamel#174 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Unused argument elimination discards required field Open

FStarLang/karamel#183 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
StackInline not inlined at extraction Open

bug

FStarLang/karamel#187 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Build fails on native Apple M1 + macOS toolchain Open

FStarLang/karamel#205 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Unit buffer elimination breaks type unification when combined with buffer built-ins Open

FStarLang/karamel#208 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Check stack memory allocation Open

FStarLang/karamel#209 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
A bug in variable merging. Open

FStarLang/karamel#216 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Simplify Steel.ST.Reference.with_local without EPushFrame/EPopFrame Open

FStarLang/karamel#276 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Improvements to compilation in C89 mode Open

FStarLang/karamel#283 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Bad interaction between unused variable elimination and "let x = if ... in" hoisting Open

FStarLang/karamel#291 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
krml redeclares variables in adjacent #if branches Open

FStarLang/karamel#293 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Can't get karamel nix flake to work Open

FStarLang/karamel#338 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Fatal error: exception Failure("[mk_expr m]: op should've been caught") Open

FStarLang/karamel#445 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
karamel/Makefile test and test/Makefile Open

FStarLang/karamel#454 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
karamel/test README.md out of date, wants rust Open

FStarLang/karamel#455 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
make tests won't link: dist/libbignum.a goes last Open

FStarLang/karamel#456 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
generated Makefile.basic exe target needs .o's Open

FStarLang/karamel#461 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Specify functions that must extract? Open

FStarLang/karamel#482 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
control stack memory allocation Open

FStarLang/karamel#521 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rust: support for interface bundles? Open

FStarLang/karamel#540 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rust: support for std::option without monomorphization? (and possibly more) Open

FStarLang/karamel#541 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Consider renaming the internal headers Open

FStarLang/karamel#546 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Deeply nested conditionals and branch polarity flips Open

FStarLang/karamel#591 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Dependencies in karamel.opam seem quite out of date Open

FStarLang/karamel#592 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Introduction.rst claims to be literate F* Open

FStarLang/karamel#607 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Checker.ml raises error for empty EBufCreateL in [infer'] but not in [check'] Open

FStarLang/karamel#627 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
-fparentheses should parenthesize & and >> Open

FStarLang/karamel#648 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
`remove_unused_parameters` crashes with `Failure("nth")` when EApp has more arguments than callee type arrow Open

ai-generated needs triaging

FStarLang/karamel#677 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[DeepTest] String hex escape greedy parsing corrupts string contents Open

ai-generated needs triaging

FStarLang/karamel#710 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[DeepTest] All-erased record type crashes Karamel during extraction Open

ai-generated needs triaging

FStarLang/karamel#712 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Syntax error in MSVC `add_underspec` (missing closing parenthesis) Open

ai-generated needs triaging

FStarLang/karamel#724 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing 16-bit byte-swap definitions in generic endianness fallbacks Open

ai-generated needs triaging

FStarLang/karamel#725 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Document that absolutely no guarantees are made for anything involving non-Low* types Open

ai-generated needs triaging

FStarLang/karamel#726 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Latent UB in `FStar_UInt128_add_u64_shift_left/right` when `s=0` Open

ai-generated needs triaging

FStarLang/karamel#727 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
MSVC `gte_mask` optimized SSE path is disabled (and the disabled code is buggy) Open

ai-generated needs triaging

FStarLang/karamel#728 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

FStarLang/karamel

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