2026-07-06 — Last Week in Carbon #7464

josh11b · 2026-07-07T02:50:31Z

josh11b
Jul 7, 2026
Maintainer

Conduct team updates:
- PENDING: transparency report for the past quarter
Moderation interventions last week:
- 2 Discord accounts were posting job searching and offering messages with no relation to our project, disregarding our community rules. Both messages were deleted, one account was warned, and the other banned.
- A user’s generic and unhelpful duplicate posts on GitHub (as comments, issues, and discussions) were hidden, and the user was warned
Activity in the past week:
- BLOCKED: new landing page mockup that would incorporate self-learning quizzes in #7237
- BLOCKED: discussing creating self-learning quizzes around the language, alongside more community culture-oriented ones.
- 5 authors have pushed 14 commits to trunk.
- 534 files have changed and there have been 6,800 additions and 4,617 deletions
- We merged 14 PRs, opened 15 additional PRs, closed 1 issue, and opened 1 new issue.

06-29 #toolchain Why do we have separate pattern blocks?
#contributing-help Trouble with the auto-import logic when using min_prelude.
#toolchain file_test has gotten very slow in debug. Some language_server tests taking over 6s, and it now adds up to over 30s.
#toolchain Crash in convert.cpp.
#toolchain Patterns in a separate block does not solve the topological ordering issues it is meant to solve. We need to treat it more like generics.
#toolchain file_test slowness bisected to #7417, filed issue #7453
PRs:
- compilation benchmark in #7368
- bindings in #7427
- recovery in #7435
- impl lookup in #7428
- virtual functions in #7438
- .Self in #7436
- expressions in patterns in #7445
- test output in #7447
- infra scripts in #7431 #7444
- others in #7434 #7433

#safety Upcoming presentation will not be recorded, but we will make a recorded version offline.

#contributing-help New rumdl (tool and VS Code extension) release should have all the fixes we need.
06-29
- Which toolchain to use for prelude build.
- Claude was able to implement a complete-looking Carbon formatter.
#generics-and-templates How to rephrase design docs in light of new generics syntax/terminology.
#generics-and-templates .Self ambiguity in identifying.
#naming "symbolic binding" vs. "checked generic binding" and "compile time binding" vs. "generic binding"
#contributing-help How to enable vlog?
- See toolchain/docs/debugging.md.
#infra conflicts between ty and uv.
06-30 .Self in facet types.
#infra Should we depend on Rust crates when useful, or roll our own?
#infra prek doesn't run clangd-tidy.
#getting-started Possible bug in how the LSP interacts with nvim.
#infra Fizzbot now lets you control whether you get pings on your own PRs.
#generics-and-templates Found another crash