auto merge of #18914 : Gankro/rust/cloned, r=aturon

Part of #18424. r? @aturon

[breaking-change]

diff --cc src/libcore/option.rs
Simple merge

diff --cc src/librustc/lint/builtin.rs
Simple merge

diff --cc src/librustc/metadata/tydecode.rs
Simple merge

diff --cc src/librustc/middle/check_match.rs
Simple merge

diff --cc src/librustc/middle/const_eval.rs
Simple merge

diff --cc src/librustc/middle/privacy.rs
Simple merge

diff --cc src/librustc/middle/resolve.rs
Simple merge

diff --cc src/librustc/middle/trans/_match.rs
Simple merge

diff --cc src/librustc/middle/trans/base.rs
Simple merge

diff --cc src/librustc/middle/trans/consts.rs
Simple merge

diff --cc src/librustc/middle/trans/context.rs
Simple merge

diff --cc src/librustc/middle/trans/debuginfo.rs
Simple merge

diff --cc src/librustc/middle/trans/meth.rs
Simple merge

diff --cc src/librustc/middle/trans/type_of.rs
Simple merge

diff --cc src/librustc/middle/ty.rs
Simple merge

diff --cc src/librustc/middle/typeck/check/mod.rs
Simple merge

diff --cc src/librustc/middle/typeck/coherence/mod.rs
Simple merge