vercel/next.js v15.4.0-canary.105

on GitHub

Core Changes

• Update font data: #81093
• Upgrade React from 4db4b21c-20250626 to 65c4decb-20250630: #81077
• [node-webstreams] Remove unused App externals from next-server bundler config: #81039
• Turbopack: apply browserslist config in dev: #81075
• [build] remove the default imports for error boundary: #81000
• Turbopack: also inline env vars with undefined value: #80990
• [devtools]: default to issues tab when error overlay is programmatically toggled: #81091
• [devtool] merge segment explorer flag into panel ui flag: #81085

Misc Changes

• [turbopack] Make internal functions private and use rcstr! macro: #81041
• build(turbopack): Update swc_core to v29.4.0: #81092
• Turbopack: Improve compaction in Persistent Caching: #80860
• Turbopack: guard against more eventual consistency: #81080
• Turbopack: instrument scope hoisting with tracing spans: #81078
• [node-webstreams] Remove unused PagesApi matching condition when setting react-server: #81037
• docs: fix grammatical error in upgrading to v15 guide: #81038
• perf(turbopack): Disable concurrent of the SWC minifier.: #80981
• Revert "perf(turbopack/rcstr): Add serialization-time optimization (#78645)": #81112
• Docs: paper cuts July 1st : #81109
• Turbopack: scope hoist tree shaking modules as well: #80527

Credits

Huge thanks to @lukesandberg, @kdy1, @sokra, @mischnic, @eps1lon, @extoci, @huozhi, @icyJoseph, and @ztanner for helping!