1.11.0

• motoko (moc)

  • feat: moc now emits the standardized target_features Wasm custom section, so binaryen-based tools (wasm-opt, ic-wasm optimize, dfx's optimize) accept and optimize Motoko output without per-tool feature flags. Previously these tools defaulted to MVP and rejected the multivalue/bulk-memory/memory64 features moc relies on (#6214).

  • feat: a Float32 literal written with more precision than the type can hold now warns (M0266), suggesting the shortest equivalent — e.g. 0.123456789 : Float32 → 0.12345679. The surplus digits were already silently discarded by rounding; the warning fires only on genuine excess (minimal literals like 0.1/3.14 stay quiet) (#6198).

  • feat: allow requiring system capability for mixin definitions (#6211).
    This makes the capability available in initializers and the mixin body.
    <system> then needs to appear on the corresponding include.

  • feat: allow effectful code in transient lets and in actor/mixin bodies with --enhanced-migration (#6191).

  • bugfix: --enhanced-migration now also applies to mixins and considers their stable fields when checking migrations (#6183).