Root cause: CI Docker images don't have wasm32v1-none target installed.
wasm-builder falls back to wasm32-unknown-unknown with -Z build-std=core,alloc
which causes duplicate alloc crate and 'exchange_malloc' lang item error.
Solution: Add 'rustup target add wasm32v1-none' before cargo build steps
in all workflows that build WASM.
Affected workflows:
- checks.yml: cargo-clippy job
- build-publish-images.yml: 11 jobs
- tests-misc.yml: test-node-metrics, test-deterministic-wasm
serde 1.0.218+ introduces serde_core which causes duplicate panic_impl
when building wasm32 with --features=serde. alloy-consensus requires
serde >= 1.0.226 so we cannot pin to older serde.
Tracking issue: #355
pezkuwichain