E4004: multiple mutable borrows

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What this means

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Metadata

• Code: E4004
• Default level: Error
• Phase: Borrow Check
• Canonical docs URL: https://docs.brim-lang.com/diagnostics/E4004
• Tags: borrow, mut

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How to fix

• narrow scopes
• split borrows
• use interiors

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Typical output

E4004: multiple mutable borrows
note: two mutable borrows overlap illegally