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Rollup of 12 pull requests#77224

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bors merged 43 commits intorust-lang:masterrust-lang/rust:masterfrom

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Sep 26, 2020

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Commits on Aug 12, 2020

• Explicitly document the size guarantees that Option makes.

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  ltratt

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• Clarify and add guarantee about `transmute`.

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• Be clear about the reverse `transmute` guarantees.

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• Be clearer about Some/None transmute.

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• Change notation.

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  ltratt

  and

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• Add Rust function pointers.

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  ltratt

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Commits on Aug 17, 2020

• Rename the types for clarity.

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• Grammar tweak.

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Commits on Sep 23, 2020

• merge `need_type_info_err(_const)`

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• unused path

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• use the correct span when dealing with inference variables

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• use relevant span when unifying `ConstVarValue`s

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• Update mdBook

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Commits on Sep 24, 2020

• Add `x.py setup`

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  jyn514

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• Remove TrustedLen requirement from BuilderMethods::switch

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  est31

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• update Miri

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• the two hardest things in programming, names and...

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• nit

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Commits on Sep 25, 2020

• Add `const_fn_floating_point_arithmetic`

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• Put floating point arithmetic behind its own feature gate

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• Add new feature gate to standard library

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• Bless tests

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• Move const fn floating point test out of `min_const_fn`

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• Use proper issue for `const_fn_floating_point_arithmetic`

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• Add missing code examples on slice iter types

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• Remove stray word from `ClosureKind::extends` docs

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• Rename `whence` to `span`

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• Remove unused #[allow(...)] statements from compiler/

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Commits on Sep 26, 2020

• rename functions

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• unused into

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• Add doc alias for pointer primitive

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• Rollup merge of #75454 - ltratt:option_optimisation_guarantees, r=dtolnay

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• Rollup merge of #76631 - jyn514:x.py-setup, r=Mark-Simulacrum

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• Rollup merge of #77076 - GuillaumeGomez:missing-code-examples-slice-iter, r=Dylan-DPC

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• Rollup merge of #77093 - lcnr:const-generics-infer-warning, r=varkor

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• Rollup merge of #77122 - ecstatic-morse:const-fn-arithmetic, r=RalfJung,oli-obk

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• Rollup merge of #77127 - camelid:update-mdbook, r=Dylan-DPC

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• Rollup merge of #77161 - est31:swich_len_already_trusted, r=petrochenkov

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• Rollup merge of #77166 - RalfJung:miri, r=RalfJung

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• Rollup merge of #77181 - GuillaumeGomez:add-pointer-alias, r=jyn514,pickfire

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• Rollup merge of #77204 - LingMan:patch-3, r=jonas-schievink

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• Rollup merge of #77207 - camelid:whence-to-span, r=jyn514

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• Rollup merge of #77211 - est31:remove_unused_allow, r=oli-obk

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