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What this means

type crosses thread boundary without Send/Sync

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Metadata

  • Code: E3029
  • Default level: Error
  • Phase: Type Check
  • Canonical docs URL: https://docs.brim-lang.com/diagnostics/E3029
  • Tags: types, threads

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How to fix

  • wrap with Mutex/Arc
  • remove non-Send captures

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Typical output

E3029: send/sync boundary
note: type crosses thread boundary without Send/Sync