Rollup of 8 pull requests#60949

Merged

bors merged 19 commits intorust-lang:masterfrom

Centril:rollup-f918e1v

May 19, 2019

Commits on May 9, 2019

make vecdeque_rotate stable
Dodo
committed
supposed to be 1.36.0
Dodo
committed

Commits on May 14, 2019

Commits on May 17, 2019

Explain that ? converts the error type using From
estebank
committed

Commits on May 19, 2019

Rollup merge of #60370 - Richard-W:const-layout-construction, r=sfackler
Centril
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Rollup merge of #60678 - DutchGhost:master, r=scottmcm
Centril
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Rollup merge of #60924 - estebank:try-msg, r=petrochenkov
Centril
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Rollup merge of #60931 - cuviper:array-iter, r=KodrAus
Centril
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Rollup merge of #60934 - fabric-and-ink:defindex_with_newtype_macro, r=petrochenkov
Centril
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Rollup merge of #60943 - blkerby:master, r=Mark-Simulacrum
Centril
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Rollup merge of #60945 - blkerby:fill_buf_nll_doc_example, r=shepmaster
Centril
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Rollup merge of #60947 - blkerby:global_alloc_typo, r=jonas-schievink
Centril
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