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vx-lang

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Vx
Vx: one language, every core.

Rust · 14 stars

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Model a microcontroller: a Cortex-M7 SKU and a DTCM capacity demo Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vx-lang/Vx#657 · Opened Sep 18, 2026
for bound with an if expression that assigns a local miscompiles on both paths Open

bug codegen

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vx-lang/Vx#655 · 1 comment · Opened Sep 17, 2026
Share one AST child-iterator instead of five hand-rolled walkers Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#654 · Opened Sep 17, 2026
Seam assert pre-scan: three traversal gaps left open after #621 Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

vx-lang/Vx#653 · 1 comment · Opened Sep 17, 2026
-j runs the whole frontend twice for a program outside the flat subset Open

parallel-frontend post-release

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#652 · 2 comments · Opened Sep 17, 2026
A trait's type parameter is not substituted into a default method body Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vx-lang/Vx#649 · Opened Sep 17, 2026
A closure literal is not coerced to Closure1 in a struct field initializer Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

vx-lang/Vx#648 · Opened Sep 17, 2026
A type argument list is split on commas without tracking nesting, so an adaptor cannot be chained Open

Difficulty 3/5 1-2 days Newbie friendliness 84/100

vx-lang/Vx#647 · Opened Sep 17, 2026
AST path: `Tensor<T>(n)` with a run-time extent allocates one element, then bitcasts a scalar into a memref descriptor Open

bug codegen

Difficulty 3/5 1-2 days Newbie friendliness 65/100

vx-lang/Vx#646 · Opened Sep 17, 2026
A trait bound on an impl's generic parameter is parsed and then ignored Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vx-lang/Vx#645 · Opened Sep 17, 2026
Nothing frees a `memref.alloc`: every buffer the compiler allocates is an unmatched `malloc` Open

bug codegen

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#642 · Opened Sep 17, 2026
A fixed-size local array is a heap allocation: `memref.alloc` where `memref.alloca` belongs Open

bug codegen

Difficulty 4/5 3-5 days Newbie friendliness 72/100

vx-lang/Vx#641 · 1 comment · Opened Sep 17, 2026
[GH CI] Enzyme library lookup in ci.yml has no empty-result guard Open

build-ci good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

vx-lang/Vx#640 · Opened Sep 17, 2026
[GH CI] Release workflow puts the workflow_dispatch version input straight into a shell script Open

build-ci good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

vx-lang/Vx#639 · Opened Sep 17, 2026
W1001: a variable initialized from a generic call is reported unused Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vx-lang/Vx#637 · Opened Sep 17, 2026
vx-format unescapes \n inside a string literal and writes the raw newline back to the source Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vx-lang/Vx#636 · Opened Sep 16, 2026
W1001 reports a variable as unused when the only use is an index read or a borrow argument around a generic method call Open

bug diagnostics

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vx-lang/Vx#635 · Opened Sep 16, 2026
AST path: a returned statically shaped tensor cannot be lent to a `&Tensor<T, [?, ?]>` parameter Open

bug codegen

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vx-lang/Vx#634 · Opened Sep 16, 2026
Flat path declines the whole module when a rank-1 elementwise result is indexed Open

bug codegen

Difficulty 3/5 1-2 days Newbie friendliness 78/100

vx-lang/Vx#633 · Opened Sep 16, 2026
comptime: a capturing comptime lambda still emits its call Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vx-lang/Vx#627 · Opened Sep 16, 2026
W1001: a variable used as a call target is reported unused Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vx-lang/Vx#623 · Opened Sep 16, 2026
Indirect calls skip borrow-materialization and reference-escape analysis Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

vx-lang/Vx#617 · Opened Sep 16, 2026
`comptime` , `grad` expression uses are omitted from HIR liveness analysis Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vx-lang/Vx#614 · Opened Sep 16, 2026
After #598, 83% of the 48-thread compile is serial floor: where each millisecond goes Open

codegen enhancement parallel-frontend

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#603 · 1 comment · Opened Sep 15, 2026
The flat corpus sweep executes NO_EXEC fixtures, and matmul_bf16's EXPECT lines were never true Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vx-lang/Vx#600 · Opened Sep 15, 2026
Trait bounds are not satisfied by an enum Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vx-lang/Vx#599 · Opened Sep 15, 2026
[Tracking] Evaluate a sort over a fixed-size array with a const N parameter at compile time Open

core-lang tracking

Difficulty 5/5 Over a week Newbie friendliness 30/100

vx-lang/Vx#595 · Opened Sep 15, 2026
[GH CI] Release workflow runs on forks when tags are synced Open

build-ci good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

vx-lang/Vx#592 · 2 comments · Opened Sep 15, 2026
flat path: a narrow enum payload used in an expression emits unparseable MLIR Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

vx-lang/Vx#581 · Opened Sep 15, 2026
comptime · phase 4: growable values in the evaluator Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#575 · Opened Sep 15, 2026
comptime · phase 3: multi-dimensional arrays in the evaluator Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#574 · Opened Sep 15, 2026
comptime · phase 2: structs in the evaluator Open

core-lang enhancement

Difficulty 4/5 3-5 days Newbie friendliness 72/100

vx-lang/Vx#573 · Opened Sep 15, 2026
A generic enum takes its payload layout from the first type argument Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

vx-lang/Vx#570 · Opened Sep 14, 2026
comptime: a shadowing let the evaluator cannot compute leaves the outer value visible Open

bug core-lang

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vx-lang/Vx#569 · Opened Sep 14, 2026
macro_rules: no repetition and no tt fragment, so a variadic macro cannot be written Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

vx-lang/Vx#565 · Opened Sep 14, 2026
CoreML primitives are organized by convention only: repo-root artifacts, CWD-relative loading, and one partial bundle in git Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

vx-lang/Vx#545 · Opened Sep 14, 2026
[Tracking] Language work the core library needs Open

core-lang stdlib tracking

Difficulty 5/5 Over a week Newbie friendliness 20/100

vx-lang/Vx#536 · Opened Sep 13, 2026
lang: `if let` and the `?` operator Open

core-lang devex enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

vx-lang/Vx#535 · Opened Sep 13, 2026
lang: slices `&[T]` and `&mut [T]` as fat references Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

vx-lang/Vx#534 · Opened Sep 13, 2026
lang: tuples Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#533 · Opened Sep 13, 2026
lang: `char` and `str` as language types Open

core-lang enhancement

vx-lang/Vx#532 · 2 comments · 1 assignee · Opened Sep 13, 2026
codegen: a generic struct with an enum field does not lower Open

codegen core-lang enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

vx-lang/Vx#530 · Opened Sep 13, 2026
lang: an implicit prelude import Open

core-lang devex enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

vx-lang/Vx#529 · Opened Sep 13, 2026
lang: dispatch operators to the `core::ops` traits Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#528 · Opened Sep 13, 2026
lang: associated types in traits Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

vx-lang/Vx#527 · Opened Sep 13, 2026
lang: `panic`, `unreachable` and `todo` intrinsics that carry a message Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#526 · 1 comment · Opened Sep 13, 2026
lang: generic methods in traits Open

core-lang enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#523 · Opened Sep 13, 2026
Nothing honours `managed:` when staging, so a host-readable declaration is allocated host-unreadable Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#516 · Opened Sep 13, 2026
NUMA: model the host's memory domains, then allocate into them Open

enhancement runtime tracking

Difficulty 5/5 Over a week Newbie friendliness 35/100

vx-lang/Vx#515 · Opened Sep 12, 2026
decision: `Ref<T, Memory>` still parses and type-checks but has no effect Open

core-lang question

Difficulty 5/5 Over a week Newbie friendliness 25/100

vx-lang/Vx#507 · Opened Sep 8, 2026

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