October 2025 Monthly report

Overview

Thanks again to Open Source Security, inc and Embecosm for their ongoing support for this project.

Project update

We have started experimenting with compiling Rust-for-Linux, as planned in our last monthly reports, and we are happy to report very few issues apart from the ones related to requiring a functional core crate. We then created a new Rust-for-Linux milestone to gather all the missing functionality required for compiling the Rust parts of the kernel, and are still collecting issues.

Work on this will continue in parallel with the last few reminaing bugfixes for core. However, due to other Embecosm projects, Pierre-Emmanuel and Arthur did not have enough time in November to complete these few remaining bugs.

In other news, our two french interns are progressing really fast and will soon begin contributing to complete milestones for certain unhandled features required for Rust-for-Linux and further existing Rust code. They are very proficient and greatly help the team with the issues they tackle. For now, they are focusing on non-critical parts of the pipeline such as emitting warnings in certain conditions and fixing Internal Compiler Errors.

We have ironed out our upstreaming processes and now rebase gccrs on top of trunk regularly. Similarly, it is really easy for us to update trunk with our latest gccrs changes, which we are currently sending upstream once a week. This caused a few pain points when bootstrapping due to existing issues in the C++ frontend, but they are now resolved.

Thanks to the work from Marc Poulhies, our CI now sends emails to the GCC Patches mailing list for each commit merged in our development repository on github. This makes it easy for GCC hackers to interact with our Rust frontend and review patches as they come in. We have been testing the system for a month now, and Marc has ironed out the kinks, meaning it will be deployed on the 10th of November after a message explaining the steps on the GCC mailing lists.

Community call

We will have our next monthly community call on the 17th of November at 10am UTC. You can subscribe to our calendar to see when the next one will be held. The call is open to everyone, even if you would just like to sit-in and listen. You can also subscribe to our mailing-list or join our Zulip chat to be notified of upcoming events.

• Jitsi link
• Calendar ID: 7060a0923ffebd3cb52b1afef35a28ff7b64f05962c9af84c23b1847f1f5f894@group.calendar.google.com
• Google calendar link
• iCal link

Call for contribution

• https://github.com/Rust-GCC/gccrs/issues/2500

• https://github.com/Rust-GCC/gccrs/issues/2376

Completed Activities

• gccrs: Fix segv in errors in type checking an impl item PR4274
• gccrs: Support generic constant impl items PR4273
• gccrs: Fix const generics handling on array types PR4272
• gccrs: fix error multiple cfg predicates PR4268
• gccrs: fix cfg attribute error with literal predicate PR4266
• gccrs: fix segfault with empty cfg attribute PR4263
• gccrs: Add support for binding const generic values to paths PR4253
• Sync with upstream (2025-10-31): 468f8a3df1cd9e63b38cd4855926e9507b916fd0 PR4251
• gccrs: Fix ICE with non-trailing const defaults PR4250
• Sync with upstream (2025-10-27): 9e10fc177be25e5430e72a5c55ce7a36c45562c3 PR4248
• gccrs: Add minus sign compilation for LiteralPattern PR4247
• gccrs: Fix negative bounds in `RangePattern` being handled incorrectly PR4243
• gccrs: Fix ICE on enum in tuple struct pattern PR4241
• Update tuple pattern type-check to attempt to continue resolving items after size error PR4239
• Fix ICE for repr attribute malformation PR4238
• gccrs: make invalid inner attributes show error PR4237
• ci: stop using pull_request event, use push PR4224
• gccrs: fix inner attr derive doesn’t show error PR4218
• gccrs: fix segfault on exported macro PR4215
• Bump clang-format version to use in CONTRIBUTING.md PR4208
• gccrs: fix ICE on missing pattern in while loop PR4207
• gccrs: fix ICE in TyVar constructor PR4206
• gccrs: Emit error when tuple-indexing on non-tuples PR4205
• ci: refactor conditional parts PR4202
• gccrs: Refactor TyTy::ConstType into separate types PR4199
• fix: early return for module file error in AST parsing PR4151
• Improve macro expansion for `libcore` PR4053

Contributors this month

• Lucas Ly Ba (new contributor!)
• Lenny Chiadmi-Delage (new contributor!)
• LowR (new contributor!)
• Lishin (new contributor!)
• elle
• Vishruth Thimmaiah
• Zhi Heng
• Marc Poulhiès
• Owen Avery
• Pierre-Emmanuel Patry
• Philip Herron
• Arthur Cohen

Overall Task Status

Bugs

Test Cases

Milestones Progress

Planned Activities

• Finish debugging core
• Continue collecting issues for Rust-for-Linux milestones
• Work on RfL issues