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Joe Groff committed f76a32def0eM
Merge pull request #4578 from timbodeit/fix-mutable-protocol-let-consts [SILOptimizer] Fix let constant of non-class protocol type being mutable
Merge pull request #4578 from timbodeit/fix-mutable-protocol-let-consts [SILOptimizer] Fix let constant of non-class protocol type being mutable