E3021: async future type mismatch

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What this means

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Metadata

• Code: E3021
• Default level: Error
• Phase: Type Check
• Canonical docs URL: https://docs.brim-lang.com/diagnostics/E3021
• Tags: types, async

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How to fix

• await inner futures
• match executor Future bounds

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Typical output

E3021: async future type mismatch
note: async expression type does not implement Future as needed