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What this means

reference cannot be sent across threads with current captures

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Metadata

  • Code: E4019
  • Default level: Error
  • Phase: Borrow Check
  • Canonical docs URL: https://docs.brim-lang.com/diagnostics/E4019
  • Tags: borrow, threads

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How to fix

  • Arc/Mutex
  • move ownership across threads

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Typical output

E4019: thread boundary borrow
note: reference cannot be sent across threads with current captures