cu29_traits: wire up CuError cause chaining#608
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…Error::source, adjust call sites for new cause handling, and add std-only serde tests with dev dependency update.
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it makes sense, especially that we have a heap anyway on embedded. |
gbin
approved these changes
Jan 5, 2026
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@codex review |
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This PR refactors CuError to store causes as boxed dynamic error types (Box<dyn Error + Send + Sync + 'static>) instead of Option. This enables proper error chaining via the Error::source() trait method while maintaining Clone and Serialize/Deserialize support through custom implementations.
Related Issue: #317