carbon-language/carbon-lang v0.0.0-0.nightly.2026.01.21

Nightly build 2026.01.21

on GitHub

What's Changed

Toolchain and implementation changes 🛠️

• Member access into a facet is not a "lookup in type of base" by @danakj in #6631
• Avoid cyclic lookup of an impl inside its own definition by @danakj in #6629
• Implement copying for ULong32, LongLong64, ULongLong64 by @ivanaivanovska in #6627
• Look through extend require in an interface or named constraint in name lookup by @danakj in #6630
• Replace OwningArrayRef with SmallVector by @jonmeow in #6633

Full Changelog: v0.0.0-0.nightly.2026.01.20...v0.0.0-0.nightly.2026.01.21