E5001: async state machine spill failure

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What this means

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Metadata

• Code: E5001
• Default level: Error
• Phase: Lowering
• Canonical docs URL: https://docs.brim-lang.com/diagnostics/E5001
• Tags: mir, async

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How to fix

• reduce captures
• split async fn

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Typical output

E5001: async state machine spill failure
note: async lowering could not spill registers across suspend