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Rollup of 5 pull requests#67704

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Dylan-DPC-zz wants to merge 13 commits intorust-lang:masterrust-lang/rust:masterfrom

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Commits on Dec 27, 2019

• Fix `Instance::resolve()` incorrectly returning specialized instances

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  wesleywiser

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• Work around a resolve bug in const prop

  oli-obk

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  3eb0585

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• Prevent polymorphic const prop on assignments

  oli-obk

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Commits on Dec 28, 2019

• Stabilize attribute macros on inline modules

  petrochenkov

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  e3155ab

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• resolve: Minor cleanup of duplicate macro reexports

  petrochenkov

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  a0d8b79

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• Resolve long compile times when evaluating always valid constants

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  wesleywiser

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• Do not ICE on lifetime error involving closures

  estebank

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• Ensure that we don't cause *new* hard errors if we suddenly can evaluate more constants during const prop

  oli-obk

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Commits on Dec 29, 2019

• Rollup merge of #64273 - petrochenkov:stabattrmod, r=Centril

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  Dylan-DPC

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• Rollup merge of #67631 - oli-obk:polymorphic_promotion, r=wesleywiser

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  Dylan-DPC

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• Rollup merge of #67667 - wesleywiser:speed_up_trivially_valid_constants, r=oli-obk

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  Dylan-DPC

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• Rollup merge of #67677 - petrochenkov:dupexp, r=Centril

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  Dylan-DPC

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• Rollup merge of #67687 - estebank:issue-67634, r=matthewjasper

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  Dylan-DPC

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