rust-lang/rustc-dev-guide

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A guide to how rustc works and how to contribute to it.

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Forks: 613
Open beginner issues: 3
Indexed issues: 139
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Dominant language: HTML
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 19, 2026
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139 open issues indexed

Document how to build rustc under the same conditions as in CI Open

A-contribution-workflows A-contributor-devex C-CI E-hard T-compiler T-infra

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

rust-lang/rustc-dev-guide#447 · 2 comments · 1 reaction · Opened Sep 18, 2019
Explain how to use gdb to debug the compiler Open

A-contribution-workflows A-contributor-devex A-debuggers C-enhancement E-help-wanted E-medium T-compiler T-libs

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

rust-lang/rustc-dev-guide#443 · 7 comments · 5 reactions · Opened Sep 9, 2019
Introduce something more about Codegen and LLVM Open

A-codegen A-contributor-onboarding A-custom-codegen-backend A-LLVM C-enhancement E-hard T-compiler

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

rust-lang/rustc-dev-guide#442 · 3 comments · Opened Sep 9, 2019
Ambiguous macro call Open

A-macros C-bug E-hard I-incorrect I-terse

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

rust-lang/rustc-dev-guide#395 · 1 comment · Opened Jul 21, 2019
Transcribe the Compiler Lecture Polonius WG: Initialization and move tracking Open

A-borrow-checker A-polonius C-enhancement E-hard E-help-wanted T-compiler

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-lang/rustc-dev-guide#376 · 2 comments · Opened Jun 29, 2019
Transcribe the Compiler Lecture Universes and Lifetimes Open

A-borrow-checker A-lifetimes A-universes C-enhancement E-help-wanted E-medium T-compiler

rust-lang/rustc-dev-guide#374 · 6 comments · 1 assignee · Opened Jun 29, 2019
Transcribe the Compiler Lecture async-await region inferencer Open

A-async A-regions C-enhancement E-help-wanted E-medium T-compiler

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

rust-lang/rustc-dev-guide#373 · 2 comments · Opened Jun 29, 2019
Summarize the Compiler Lecture async-await implementation plans Open

A-async C-enhancement E-help-wanted E-medium E-needs-investigation T-compiler T-types WG-async

Difficulty 4/5 3-5 days Newbie friendliness 15/100

rust-lang/rustc-dev-guide#372 · 6 comments · Opened Jun 29, 2019
Transcribe the Compiler Lecture Convert Closure Upvar Representation to Tuples with blitzerr Open

A-closures C-enhancement E-help-wanted E-medium T-compiler

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

rust-lang/rustc-dev-guide#371 · Opened Jun 29, 2019
Transcribe the Compiler Lecture blitzerr closure upvar tys Open

A-closures A-types C-enhancement E-help-wanted E-medium T-compiler

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

rust-lang/rustc-dev-guide#370 · Opened Jun 29, 2019
Transcribe the Compiler Lecture closures and upvar capture Open

A-closures C-enhancement E-help-wanted E-medium T-compiler

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

rust-lang/rustc-dev-guide#369 · Opened Jun 29, 2019
Transcribe the Compiler Lecture RFC #2229 Disjoint Field Capture plan Open

A-closures C-enhancement E-help-wanted E-medium T-compiler T-lang

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

rust-lang/rustc-dev-guide#368 · 1 comment · Opened Jun 29, 2019
Transcribe the Compiler Lecture How the chalk-engine crate works 2 Open

E-help-wanted T-types

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

rust-lang/rustc-dev-guide#367 · Opened Jun 29, 2019
Transcribe the Compiler Lecture How the chalk-engine crate works Open

E-help-wanted T-types

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

rust-lang/rustc-dev-guide#366 · Opened Jun 29, 2019
Transcribe the Compiler Lecture Coherence in Chalk by Sunjay Varma - Bay Area Rust Meetup Open

E-help-wanted T-types

Difficulty 3/5 1-2 days Newbie friendliness 20/100

rust-lang/rustc-dev-guide#365 · 1 comment · Opened Jun 29, 2019
Transcribe the Compiler Lecture rustc-chalk integration overview Open

E-help-wanted T-types

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

rust-lang/rustc-dev-guide#364 · Opened Jun 29, 2019
Transcribe the Compiler Lecture Polonius-rustc walkthrough Open

A-polonius E-help-wanted T-compiler

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-lang/rustc-dev-guide#363 · 4 comments · Opened Jun 29, 2019
Transcribe the Compiler Lecture oli-obk on miri and constant evaluation Open

A-const-eval A-miri E-help-wanted E-medium T-compiler WG-const-eval

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-lang/rustc-dev-guide#362 · 1 comment · Opened Jun 29, 2019
Transcribe the Compiler Lecture rust-analyzer type-checker overview by flodiebold Open

A-type-check E-help-wanted E-medium T-rust-analyzer

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

rust-lang/rustc-dev-guide#361 · Opened Jun 29, 2019
Transcribe the Compiler Lecture Rust analyzer syntax trees Open

A-AST C-enhancement E-help-wanted E-medium T-rust-analyzer

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-lang/rustc-dev-guide#360 · 2 comments · Opened Jun 29, 2019
Transcribe the Compiler Lecture Cranelift Open

A-cg-cranelift C-enhancement E-medium T-compiler

Difficulty 3/5 1-2 days Newbie friendliness 25/100

rust-lang/rustc-dev-guide#358 · 3 comments · 1 reaction · Opened Jun 29, 2019
Background on `impl Trait` Open

A-existential-types C-enhancement E-hard T-compiler T-types WG-async

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

rust-lang/rustc-dev-guide#339 · Opened Jun 14, 2019
document MIR-optimizations Open

A-mir-opt C-enhancement E-hard E-help-wanted T-compiler WG-mir-opt

Difficulty 4/5 3-5 days Newbie friendliness 38/100

rust-lang/rustc-dev-guide#331 · 4 comments · Opened Jun 7, 2019
Add information on updating dependencies Open

A-dependencies C-enhancement E-help-wanted E-medium T-bootstrap T-compiler T-infra T-libs T-rustdoc T-rustdoc-frontend

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

rust-lang/rustc-dev-guide#310 · 2 comments · Opened Apr 27, 2019
Incorporate guidance on long error messages Open

A-diagnostics C-enhancement E-help-wanted E-medium T-compiler WG-diagnostics

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

rust-lang/rustc-dev-guide#295 · 3 comments · Opened Apr 15, 2019
Describe how to swap in local modified crate Open

A-contribution-workflows C-enhancement E-easy E-help-wanted T-bootstrap T-compiler

Difficulty 2/5 1-3 hours Newbie friendliness 43/100

rust-lang/rustc-dev-guide#268 · 1 comment · Opened Jan 22, 2019
Explain all the stable hashing shenanigans Open

A-incr-comp C-enhancement E-help-wanted E-medium E-needs-writeup T-compiler

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

rust-lang/rustc-dev-guide#203 · 10 comments · Opened Sep 20, 2018
Document HIR ty lowering Open

A-HIR C-enhancement E-hard E-help-wanted T-compiler T-types

rust-lang/rustc-dev-guide#178 · 10 comments · 1 assignee · Opened Aug 8, 2018
Guide mentions trait evaluation (as part of selection), but does not explain it Open

A-trait-system C-enhancement E-hard T-compiler T-types

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

rust-lang/rustc-dev-guide#174 · 4 comments · Opened Jul 30, 2018
add notes about `rustdoc-ui` and `rustdoc-js` tests Open

A-test-suite C-enhancement E-help-wanted E-medium T-rustdoc

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

rust-lang/rustc-dev-guide#120 · 1 comment · 1 reaction · Opened May 2, 2018
More information on attributes Open

A-AST A-attributes A-HIR C-enhancement E-hard T-compiler

rust-lang/rustc-dev-guide#104 · 10 comments · 1 reaction · 1 assignee · Opened Mar 27, 2018
document where various bits of rust are desugared Open

A-desugaring A-HIR A-MIR A-THIR C-enhancement E-hard T-compiler

Difficulty 4/5 3-5 days Newbie friendliness 38/100

rust-lang/rustc-dev-guide#94 · 6 comments · Opened Mar 19, 2018
Document common manipulations and operations Open

A-contributor-onboarding A-examples C-enhancement E-help-wanted E-medium T-compiler

Difficulty 3/5 1-2 days Newbie friendliness 38/100

rust-lang/rustc-dev-guide#91 · 6 comments · 2 reactions · Opened Mar 15, 2018
advice for debugging incremental compilation hashing failures etc Open

A-contributor-devex A-incr-comp C-enhancement E-hard E-help-wanted T-compiler WG-incr-comp

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

rust-lang/rustc-dev-guide#87 · 5 comments · Opened Mar 13, 2018
Parallel rustc Open

C-enhancement E-hard E-help-wanted T-compiler WG-parallel-rustc

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

rust-lang/rustc-dev-guide#81 · 2 comments · 1 reaction · Opened Mar 9, 2018
Switching Out LLVM Backends Open

A-custom-codegen-backend A-LLVM C-enhancement E-hard E-help-wanted T-compiler

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

rust-lang/rustc-dev-guide#71 · 1 comment · Opened Mar 2, 2018
Writing mentored issues Open

A-contribution-workflows A-contributor-onboarding A-social E-help-wanted E-needs-writeup T-compiler

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

rust-lang/rustc-dev-guide#64 · 8 comments · Opened Feb 23, 2018
"name resolution" Open

A-resolve C-enhancement E-hard T-compiler

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

rust-lang/rustc-dev-guide#16 · 15 comments · Opened Jan 18, 2018
"The parser" Open

A-AST A-lexing A-parser C-enhancement E-hard E-help-wanted T-compiler

Difficulty 4/5 3-5 days Newbie friendliness 28/100

rust-lang/rustc-dev-guide#13 · 12 comments · 2 reactions · Opened Jan 18, 2018

rust-lang/rustc-dev-guide

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