Migrating C to Rust with Jonas Kruckenberg

Allen Wyma talks with Jonas Kruckenberg from Mainmatter about migrating production C and C++ codebases to Rust and the C to Rust Migration Book. They discuss incremental migration, refactoring legacy code, designing safe FFI boundaries, and testing undefined behavior. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps [@00:00] - Intro [@00:10] - Welcome and introducing Jonas Kruckenberg [@01:52] - From JavaScript and Tauri to Rust, k23, and Mainmatter [@04:41] - Incremental migration versus a complete rewrite [@07:51] - The C to Rust Migration Book [@13:11] - Why starting with leaf modules can fail [@15:31] - Refactoring C before rewriting it in Rust [@17:26] - Building safe Rust interfaces over C linked lists [@22:06] - Undefined behavior and legacy FFI code [@23:29] - Porting strcmp calls with null pointers [@25:24] - Testing tools, assertions, and the FFI trust boundary [@27:39] - Finding the book and getting in touch [@28:25] - Memory safety and the future of Rust Referenced resources The C to Rust Migration Book Tauri k23 Credits Intro Theme: Aerocity Audio Editing: Plangora Hosting Infrastructure: Jon Gjengset Show Notes: Plangora Hosts: Allen Wyma

Allen Wyma talks with Costa Alexoglou and Iason Paraskevopoulos, creators of Hopp, a tool that enables remote pair programming sessions. Hopp is built with Tauri and Rust, and is open source. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps [@0:00] - Meet Costa Alexoglou and Iason Paraskevopoulos [@3:12] - The problem with existing tools: high latency and poor quality [@7:28] - Why Tauri was chosen (and its limitations) [@10:28] - Moving from WebKit to a custom Rust WebRTC implementation [@14:34] - How Hopp handles ultra-low latency screen sharing [@22:50] - Technical deep dive: Bypassing browser limitations on macOS [@31:18] - Roadmap: Migrating fully to Rust and future integrations [@34:25] - Linux support challenges and distribution [@41:03] - Using iced for Rust-based UI rendering [@42:14] - Closing thoughts Credits Intro Theme: Aerocity Audio Editing: Plangora Hosting Infrastructure: Jon Gjengset Show Notes: Plangora Hosts: Allen Wyma

Jon and Ben discuss the highlights of the Rust 2024 Edition. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps & referenced resources [@03:05] - RPIT lifetime capture rules [@08:00] - let chains in if and while if let temporary scope Mara’s post on “super let” Tail expression temporary scope [@19:15] - Match ergonomics reservations [@24:49] - Unsafe extern blocks [@29:15] - Unsafe attributes [@32:03] - unsafe_op_in_unsafe_fn warning [@34:51] - Disallow references to static mut [@39:20] - Never type fallback change [@43:33] - Macro Fragment Specifiers [@47:47] - gen keyword [@49:36] - Changes to the prelude [@50:32] - Add IntoIterator for Box<[T]> [@56:03] - Newly unsafe functions [@58:51] - Rust-version aware Cargo resolver [@1:03:03] - Cargo table and key name consistency [@1:03:57] - Reject unused inherited default-features [@1:05:37] - Rustdoc combined doctests [@1:07:13] - Rustdoc nested include! change [@1:09:19] - The rustfmt style edition Credits Intro Theme: Aerocity Audio Editing: synchis Hosting Infrastructure: Jon Gjengset Show Notes: Jon Gjengset Hosts: Jon Gjengset and Ben Striegel

Jon and Ben discuss the highlights of the 1.88 through 1.90 releases of Rust. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps & referenced resources [@00:26] - Rust 1.88 [@00:26] - Let chains The if let temporary scope [@09:09] - Naked functions [@11:55] - Boolean configuration [@14:15] - Cargo automatic cache cleaning [@17:52] - Stabilized APIs [@17:52] - hint::select_unpredictable [@21:16] - <[T]>::as_chunks [@22:25] - Default for *const T [@23:13] - HashMap::extract_if [@23:43] - More metadata from Span [@24:48] - Changelog deep-dive [@24:48] - De-stabilize #[bench] [@26:55] - --no-capture [@28:31] - Rust 1.89 [@28:40] - Explicitly inferred arguments to const generics [@30:14] - Mismatched lifetime syntaxes lint [@35:29] - More x86 target features [@36:33] - Cross-compiled doctests [@38:31] - i128 and u128 in extern "C" functions [@40:38] - Demoting x86_64-apple-darwin to Tier 2 Platform support policy [@42:18] - Standards Compliant C ABI on wasm32-unknown-unknown More about the ABI changes [@46:05] - Stabilized APIs [@46:05] - File::lock [@48:34] - Changelog deep-dive [@48:40] - aarch64 frame pointers Why do frame pointers matter? [@49:59] - Allow storing format_args! in variable Behind the scenes of format_args! [@51:38] - rustdoc sidebar on mobile [@52:14] - Rust 1.90 [@52:14] - LLD is now the default linker on x86_64-unknown-linux-gnu PR with lots of linked resources rustc performance diff with lld [@1:01:26] - Cargo adds native support for workspace publishing [@1:03:03] - Stabilized APIs [@1:03:26] - u{n}::saturating_sub_signed [@1:04:20] - Changelog deep-dive [@1:04:20] - home_dir fall back if HOME is set but empty Credits Intro Theme: Aerocity Audio Editing: synchis Hosting Infrastructure: Jon Gjengset Show Notes: Jon Gjengset Hosts: Jon Gjengset and Ben Striegel

Jon and Ben discuss the highlights of the 1.85 through 1.88 releases of Rust. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps & referenced resources [@01:11] - Rust 1.85 [@02:05] - async closures RFC 3668 Stabilization report [@07:45] - Hiding trait implementations from diagnostics [@09:43] - FromIterator and Extend for tuples [@12:10] - Updates to std::env::home_dir() Deprecation discussion Deprecation PR Originally abandoned fix Undeprecation [@15:19] - Stabilized APIs [@15:30] - number::midpoint [@16:18] - Waker::noop [@17:49] - ptr::fn_addr_eq [@20:10] - Changelog deep-dive [@20:10] - De-duplicate and improve definition of c_char [@22:56] - More constification [@23:51] - Rust 1.85.1 [@24:46] - Rust 1.86 [@25:24] - Trait upcasting [@30:49] - HashMaps and slices now support indexing multiple elements mutably [@33:50] - Allow safe functions to be marked with the #[target_feature] attribute [@36:21] - Debug assertions that pointers are non-null when required for soundness [@39:48] - Make missing_abi lint warn by default [@40:55] - Target deprecation warning for 1.87.0 [@42:25] - Stabilized APIs [@42:25] - {float}::next_up [@44:55] - Vec::pop_if [@46:41] - Changelog deep-dive [@46:41] - Changing -O to opt-level=3 [@47:47] - Optimized rustc binaries for aarch64 [@49:04] - Deprecate cargo --token [@49:43] - No more “did you mean” in Cargo [@50:14] - Sans-serif in rustdoc [@50:45] - Rust 1.87 [@51:27] - Anonymous pipes [@53:06] - Safe architecture intrinsics Update the standard library to Rust 2024 [@55:00] - asm! jumps to Rust code [@57:06] - Precise capturing in impl Trait in trait definitions The Captures “trick” Talk on impl Trait [@58:45] - Stabilized APIs [@58:45] - Vec::extract_if [@1:00:13] - <[T]>::split_off [@1:01:47] - OsStr::display [@1:03:40] - <uN>::cast_signed [@1:04:41] - <uN>::is_multiple_of [@1:05:31] - <uN>::unbounded_shl [@1:06:20] - TryFrom<Vec<u8>> for String [@1:06:46] - Box<MaybeUninit<T>>::write [@1:08:23] - String::extend_from_within [@1:07:46] - Changelog deep-dive [@1:07:46] - Actually un-deprecate home_dir [@1:10:41] - Cargo SBOM support (RFC 3553) [@1:11:48] - More Cargo ANSI sequences Credits Intro Theme: Aerocity Audio Editing: synchis Hosting Infrastructure: Jon Gjengset Show Notes: Jon Gjengset Hosts: Jon Gjengset and Ben Striegel

Jon and Ben discuss the highlights of the 1.81 through 1.84 releases of Rust. This episode was recorded as part of a YouTube live stream on 2025-10-26, which you can still watch. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps & referenced resources [@01:58] - Rust 1.81 [@02:05] - core::error::Error Tracking issue for generic member access build-std Rust project goal [@08:27] - New sort implementations PR implementing the change Repo with the research [@10:49] - #[expect(lint)] [@14:37] - Lint reasons [@16:18] - Stabilized APIs [@16:34] - Duration::abs_diff [@17:25] - hint::assert_unchecked [@22:36] - fs::exists [@25:37] - Compatibility notes [@20:40] - Split panic hook and panic handler arguments [@23:00] - Abort on uncaught panics in extern "C" functions [@27:01] - WASI 0.1 target naming changed [@30:10] - Fix for CVE-2024-43402 CVE announcement [@33:39] - Rust 1.82 [@33:39] - cargo info [@35:06] - Apple target promotions Platform support tiers [@40:10] - Precise capturing use<..> syntax The Captures “trick” Talk on impl Trait [@47:24] - Native syntax for creating a raw pointer Pointers Are Complicated Pointers Are Complicated II Pointers Are Complicated III [@53:43] - Safe items with unsafe extern [@59:32] - Unsafe attributes [@1:03:44] - Omitting empty types in pattern matching The never type [@1:11:33] - Floating-point NaN semantics and const [@1:17:41] - Constants as assembly immediates [@1:19:06] - Safely addressing unsafe statics [@1:22:56] - Stabilized APIs [@1:23:03] - thread::Builder::spawn_unchecked [@1:25:10] - Working with MaybeUninit [@1:25:48] - Exposed SIMD intrinsics [@1:26:14] - Changelog deep-dive [@1:26:26] - Rewrite binary search implementation [@1:27:30] - Rust 1.83 [@1:27:55] - New const capabilities [@1:31:50] - Stabilized APIs [@1:32:06] - New io::ErrorKind variants [@1:33:10] - Option::get_or_insert_default [@1:34:56] - char::MIN [@1:35:48] - Changelog deep-dive [@1:35:48] - Unicode 16 Emoji [@1:39:51] - Sysroot trim-paths [@1:41:31] - cargo update informs of outdated versions [@1:42:43] - cargo --timings dark mode [@1:43:15] - Checksum-based freshness in Cargo nightly [@1:44:26] - Rust 1.84 [@1:44:40] - Cargo considers Rust version for dependency version selection [@1:49:03] - Migration to the new trait solver begins [@1:51:47] - Strict provenance APIs Pointers Are Complicated Pointers Are Complicated II Pointers Are Complicated III Rust has provenance Gankra’s write-up on raw pointer design Strict provenance APIs tracking issue [@1:57:53] - Stabilized APIs [@1:57:58] - <int>::isqrt [@1:58:15] - core::ptr::dangling [@1:59:15] - Changelog deep-dive [@1:59:15] - Include Cargo.lock in published crates [@2:00:12] - wasm32-wasi target removed [@2:01:06] - &raw *invalid_ptr is fine Credits Intro Theme: Aerocity Audio Editing: synchis Hosting Infrastructure: Jon Gjengset Show Notes: Jon Gjengset Hosts: Jon Gjengset and Ben Striegel

Allen Wyma talks with Jonathan Kelley, creator of Dioxus, a framework for building web, mobile, and desktop apps with a single Rust codebase. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps [@00:00] - Meet Jonathan Kelley, Creator of Dioxus [@01:55] - The Origin & Core Technology of Dioxus [@24:45] - Hot Reloading for a Faster Workflow [@30:20] - The Road to a Stable 1.0 Release [@36:36] - The Future Vision: Full-Stack, Native APIs, and Beyond [@42:55] - Collaboration within the Rust UI Ecosystem Credits Intro Theme: Aerocity Audio Editing: Plangora Hosting Infrastructure: Jon Gjengset Show Notes: Plangora Hosts: Allen Wyma

Allen Wyma talks with Adi Seredinschi, creator of Malachite, a Byzantine-fault tolerant (BFT) consensus engine implemented in Rust. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps [@0:00] - Meet Adi Seredinsky, Director of Product at Informal Systems [@5:23] - From Go to Rust: The Malachite rewrite of Tendermint [@9:26] - Technical challenges of the original Go codebase [@16:56] - Why Rust was chosen for the rewrite [@22:23] - Quint: A developer-friendly language for formal methods [@33:48] - Performance gains from the Rust rewrites [@40:42] - Closing thoughts Credits Intro Theme: Aerocity Audio Editing: Plangora Hosting Infrastructure: Jon Gjengset Show Notes: Plangora Hosts: Allen Wyma

In this episode, host Gábor Szabó talks to Eli Shalom, Eureka Labs’ Co-Founder and CTO, and Senior Software Engineer Igal Tabachnik about how Rust is powering infrastructure at Eureka Labs - a blockchain company operating in a low-latency, high-throughput environment. Eureka Labs’ work focuses on advancing the logic of block construction to support more efficient execution and expand the functionality that can be packed into each block’s limited timeframe. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps & referenced resources [@0:00] - The Code-Maven live meeting series on Rust at Work. [@1:14] - Eli Shalom Co-Founder and CTO of Eureka Labs. [@2:20] - Igal Tabachnik Senior Software Engineer. Scala [@4:00] - About Eureka Labs and the “block builder”. Blockchain Ethereum Networks [@7:10] - What is blockchain? What is block building? Smart contract Smart contracts on Ethereum NP-Hard problem [@15:00] - Why Rust? reth [@25:45] - Ethereum implementation and deployment Ethereum specs and standards EIP - Ethereum Improvement Proposals [@35:06] - How did you get started with Rust? Scala Haskell functional programming virtual threads / green threads / tokio Eq trait F# Constraints Liberate, Liberties Constrain talk by Runar Bjarnason. [@48:40] - How do you select the crates you use? Elm [@55:03] - How much do you use AI? Which AI tools do you use? Claude Code Amp of Sourcegraph GitHub Co-pilot ChatGPT LLMs Perlexity JetBrains [@1:04:05] - What should people do in order to be a better candidate for a job at your company? Vibe coding [@1:08:30] - Things to take into account when selecting a language [@1:10:48] - Training and mentoring new developers Redis Learning Rust: The Rust Book. Live coding streams by Jon Gjengset. Rust for Rustaceans book by Jon Gjengset. [@1:16:00] - Final notes Igal can be contacted on X/twitter @hmemcpy or via email at [email protected] Credits Intro Theme: Aerocity Audio Editing: Gábor Szabó Hosting Infrastructure: Jon Gjengset Show Notes: Gábor Szabó Hosts: Gábor Szabó

Allen Wyma talks with DongYoon Kang aka kdy, creator of SWC, a Rust-based platform for creating fast developer tools. It’s used in existing projects such as Next.js, Parcel, and Deno. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: [email protected] Timestamps [@0:00] - Meet DongYoon Kang, creator of SWC, the Rust-based platform for the Web [@1:54] - SWC creation & background [@5:00] - Adoption by Deno, Next.js, and others [@8:45] - Learning Rust and building SWC [@11:14] - Community contributions and team structure [@14:48] - Performance improvements with Chili [@17:57] - SWC modules and supported languages [@20:28] - Exploring Dart support [@21:37] - Future plans for SWC Credits Intro Theme: Aerocity Audio Editing: Plangora Hosting Infrastructure: Jon Gjengset Show Notes: Plangora Hosts: Allen Wyma