gren-lang/compiler

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Compiler for the Gren programming language

Stars: 503
Forks: 29
Open beginner issues: 0
Indexed issues: 101

Dominant language: Haskell
License: No license data
Last GitHub push: Aug 17, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

101 open issues indexed

Output to STDOUT blocks reporting to STDERR Open

bug good first issue

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

gren-lang/compiler#388 · 1 comment · Opened Sep 8, 2026
A port's definition can be emitted before the kernel code it calls Open

bug

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

gren-lang/compiler#387 · Opened Sep 6, 2026
A node program that crashes exits with status 0 Open

bug

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

gren-lang/compiler#385 · Opened Sep 5, 2026
`\u{FFFF}` in a string literal produces the wrong result for a couple different reasons Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

gren-lang/compiler#384 · Opened Sep 3, 2026
`//` truncates its result to 32 bits when inlined, but not when passed as a function Open

bug good first issue

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

gren-lang/compiler#383 · 1 comment · Opened Aug 31, 2026
`gren package validate` should validate CHANGELOG entry Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

gren-lang/compiler#382 · Opened Jul 18, 2026
Compiler optimizing out unreferenced ports causes unexpected errors Open

bug enhancement

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

gren-lang/compiler#381 · Opened Jul 16, 2026
Haskell-based compiler 0.6.5 crashes when compiling a package that has a summary field >= 80 chars Open

bug good first issue help wanted

Difficulty 3/5 1-2 days Newbie friendliness 55/100

gren-lang/compiler#380 · Opened Jun 28, 2026
`Bytes` field in record becomes undefined when used as `Flags` Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

gren-lang/compiler#376 · Opened Jun 8, 2026
Discussion: formatting options Open

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

gren-lang/compiler#374 · 5 comments · Opened May 27, 2026
Custom platforms Open

language proposal

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

gren-lang/compiler#373 · 1 reaction · Opened May 20, 2026
Getting rid of effect modules and ports Open

language proposal

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

gren-lang/compiler#372 · Opened May 19, 2026
Transparent tasks and commands Open

language proposal

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

gren-lang/compiler#371 · Opened May 19, 2026
`gren run` should support `--optimize` Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

gren-lang/compiler#369 · Opened Apr 20, 2026
Unclear error for two doc comments for a declaration Open

error message

Difficulty 3/5 1-2 days Newbie friendliness 35/100

gren-lang/compiler#366 · Opened Mar 16, 2026
Closures in recursive calls get shadowed, causing stack overflows Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

gren-lang/compiler#365 · Opened Feb 16, 2026
Proposal: Add BigInt support to Gren for correct 64-bit integers and future-proof interop Open

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

gren-lang/compiler#364 · 2 comments · Opened Feb 6, 2026
Feature request: add `gren_packages/` to `.gitignore` by default when `gren init` Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

gren-lang/compiler#353 · 2 comments · Opened Sep 23, 2025
Minor race condition in line order of compiler error output Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

gren-lang/compiler#352 · 4 comments · Opened Sep 13, 2025
gren make —optimize doesn’t error on Debug module Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

gren-lang/compiler#349 · 1 comment · Opened Aug 30, 2025
`gren run` should spawn the program with the same node process Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

gren-lang/compiler#347 · Opened Aug 4, 2025
Improve context of error messages Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

gren-lang/compiler#340 · Opened Jul 31, 2025
Include the packages that causes the version conflict in the error message Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

gren-lang/compiler#320 · 1 reaction · Opened Jul 25, 2025
Optimize fn calls on local functions Open

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

gren-lang/compiler#314 · Opened Jul 24, 2025
Remove Gren prefix when generating JS modules Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

gren-lang/compiler#313 · Opened Jul 24, 2025
Make `Bytes` a possible `Flag` value Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

gren-lang/compiler#312 · Opened Jul 24, 2025
Add simple integration tests that runs in github actions Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

gren-lang/compiler#311 · Opened Jul 24, 2025
gren make/run --watch Open

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

gren-lang/compiler#310 · 1 reaction · Opened Jul 24, 2025
gren generate Open

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

gren-lang/compiler#309 · Opened Jul 24, 2025
gren files to easily implement file watching in vite-plugin-gren Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

gren-lang/compiler#299 · Opened Jul 19, 2025
Use FileSystem.Lock to coordinate multiple compiler instances Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

gren-lang/compiler#298 · Opened Jul 19, 2025
Cache compiled modules for `gren run --package` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

gren-lang/compiler#296 · Opened Jul 11, 2025
Unit type should not be treated as extensible record? Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

gren-lang/compiler#286 · Opened May 9, 2025
Alternative to The Elm Architecture Open

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

gren-lang/compiler#282 · 6 comments · 1 reaction · Opened Apr 11, 2025
Improve error messages for filter functions Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

gren-lang/compiler#281 · 1 reaction · Opened Feb 7, 2025
Unhelpful error message for case/of Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

gren-lang/compiler#277 · 1 reaction · Opened Jan 22, 2025
Transient local dependencies are evaluated based on application directory Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

gren-lang/compiler#272 · Opened Dec 13, 2024
--optimize fails when destructuring a record that is never constructed Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

gren-lang/compiler#271 · Opened Dec 13, 2024
Case expression with Array.popFirst and redundant branches Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

gren-lang/compiler#268 · 5 comments · Opened Nov 11, 2024
Underscore type params Open

language proposal

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

gren-lang/compiler#266 · 1 reaction · Opened Oct 25, 2024
When a local package fails to compile, the compiler should display the compilation error Open

enhancement

gren-lang/compiler#261 · 1 assignee · Opened Aug 29, 2024
"package is corrupted" error when running validate with newly released compiler Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

gren-lang/compiler#252 · Opened Jul 4, 2024
exhaustive record pattern Open

accepted language proposal

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

gren-lang/compiler#247 · 1 comment · 1 reaction · Opened Jun 18, 2024
Reconsider /= as not equals Open

language proposal

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

gren-lang/compiler#245 · 5 comments · 5 reactions · Opened Jun 14, 2024
Gren Format command removes multiline comments, format also moves comments away from documented code Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

gren-lang/compiler#244 · 1 comment · Opened Apr 27, 2024
Add documentation command Open

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

gren-lang/compiler#242 · 4 reactions · Opened Apr 22, 2024
Move extensibility to use-site Open

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

gren-lang/compiler#240 · 6 comments · Opened Jan 23, 2024
Bad error message caused by let expression with too little indentation Open

accepted bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

gren-lang/compiler#235 · Opened Dec 13, 2023
`package validate` should catch dependencies with too wide constraints Open

bug help wanted

Difficulty 3/5 1-2 days Newbie friendliness 35/100

gren-lang/compiler#230 · Opened Oct 3, 2023
Locally expose all from a module Open

language proposal

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

gren-lang/compiler#224 · 2 comments · 4 reactions · Opened Sep 12, 2023

gren-lang/compiler

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