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Making Rust Workers reliable: panic and abort recovery in wasm‑bindgen

ID: fa994bb9-bab6-5f14-b095-5a2955842eb8

STIX ID: report--fa994bb9-bab6-5f14-b095-5a2955842eb8

Feed Name: Cloudflare Blog

Date Published: 2026-04-22

Date Updated: 2026-04-27

Author: Guy Bedford

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This post describes how Cloudflare and wasm-bindgen upstream contributions addressed Rust-on-Wasm reliability by adding panic=unwind support, exception-handling integration, abort classification and recovery hooks, and an experimental state-reset mechanism; it covers implementation details, toolchain changes, runtime behaviors, platform compatibility, and guidance for users to avoid sandbox poisoning and preserve in-memory state.

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