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Rollup of 3 pull requests#70534

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bors merged 6 commits intorust-lang:masterrust-lang/rust:masterfrom

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Mar 29, 2020

Commits

Commits on Mar 19, 2020

• Add Result<Result<T, E>, E>::flatten -> Result<T, E>

  Nemo157

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  6fe7867

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Commits on Mar 29, 2020

• reduce rustc_attr usage in places

  Centril

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  59a6970

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• Update LLVM submodule

  Amanieu

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  4a4314e

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• Rollup merge of #70140 - Nemo157:result-flatten, r=Amanieu

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  Centril

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  8212a1c

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• Rollup merge of #70526 - Centril:less-attr, r=eddyb

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  Centril

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• Rollup merge of #70527 - Amanieu:fix_fastisel, r=Mark-Simulacrum

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  Centril

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