v15.4.0-canary.64

Core Changes

• [dynamicIO] Document client component remediations for sync IO: #79787
• [dynamicIO] prioritize preprocessing RSC rows when prerendering: #80125
• [dev-overlay] Remove unused onError in /pages: #79982
• Remove unused vendored server-inserted-metadata module: #80143
• Webpack Build: Use name-contenthash instead of name-chunkhash for dynamic imports: #80153

Misc Changes

• chore(turbopack): Remove unused dependencies reported by cargo-shear: #80121
• [turbopack] Eliminate many calls to into and from and cell involving RcStr: #80076
• fix(turbo-persistence): Atomically mark old versioned directories for deletion before deleting them: #80082
• Turbopack: Improve errors when opening SST files: #80106

Credits

Huge thanks to @gnoff, @bgw, @lukesandberg, @eps1lon, @sokra, and @timneutkens for helping!