Rollup of 4 pull requests

[tmandry]

Successful merges:

• Print out more information for -Zunpretty=expanded,hygiene #64486 (Print out more information for -Zunpretty=expanded,hygiene)
• update Nomicon and Reference #64516 (update Nomicon and Reference)
• Load proc macro metadata in the correct order. #64528 (Load proc macro metadata in the correct order.)
• Update Cargo #64536 (Update Cargo)

Failed merges:

r? @ghost

[tmandry]

@bors r+ p=4

[bors]

📌 Commit 4d94422 has been approved by tmandry

[bors]

⌛ Testing commit 4d94422 with merge 9c227d1e30c7a213ce2da303184f4855772ecdeb...

[rust-highfive]

The job dist-x86_64-apple-alt of your PR failed (pretty log, raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

2019-09-18T03:47:33.0639540Z [RUSTC-TIMING] cargo test:false 184.425
2019-09-18T03:47:50.1505190Z [RUSTC-TIMING] rls test:false 179.841
2019-09-18T03:47:53.4857240Z [RUSTC-TIMING] rls test:false 3.273
2019-09-18T03:47:53.5328340Z     Finished release [optimized] target(s) in 5m 01s
2019-09-18T03:47:53.5894810Z duplicate artifacts found when compiling a tool, this typically means that something was recompiled because a transitive dependency has different features activated than in a previous build:
2019-09-18T03:47:53.5895270Z 
2019-09-18T03:47:53.5895830Z the following dependencies are duplicated although they have the same features enabled:
2019-09-18T03:47:53.5896200Z the following dependencies have different features:
2019-09-18T03:47:53.5897380Z   tar 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)
2019-09-18T03:47:53.5898310Z     `rls` additionally enabled features {} at "/Users/vsts/agent/2.155.1/work/1/s/build/x86_64-apple-darwin/stage1-tools/x86_64-apple-darwin/release/deps/libtar-9b87067b769484f5.rlib"
2019-09-18T03:47:53.5899210Z     `cargo` additionally enabled features {"default", "xattr"} at "/Users/vsts/agent/2.155.1/work/1/s/build/x86_64-apple-darwin/stage1-tools/x86_64-apple-darwin/release/deps/libtar-1b9488c5c76ec99f.rlib"
2019-09-18T03:47:53.5899360Z 
2019-09-18T03:47:53.5900760Z to fix this you will probably want to edit the local src/tools/rustc-workspace-hack/Cargo.toml crate, as that will update the dependency graph to ensure that these crates all share the same feature set
2019-09-18T03:47:53.5901630Z thread 'main' panicked at 'tools should not compile multiple copies of the same crate', src/bootstrap/tool.rs:198:13
2019-09-18T03:47:53.6019080Z failed to run: /Users/vsts/agent/2.155.1/work/1/s/build/bootstrap/debug/bootstrap dist
2019-09-18T03:47:53.6019620Z Build completed unsuccessfully in 1:22:59
2019-09-18T03:47:53.6093610Z == clock drift check ==
2019-09-18T03:47:53.6140600Z   local time: Wed Sep 18 03:47:53 UTC 2019
2019-09-18T03:47:53.6140600Z   local time: Wed Sep 18 03:47:53 UTC 2019
2019-09-18T03:47:53.7174280Z   network time: Wed, 18 Sep 2019 03:47:53 GMT
2019-09-18T03:47:53.7177340Z == end clock drift check ==
2019-09-18T03:47:53.7405440Z ##[error]Bash exited with code '1'.
2019-09-18T03:47:53.7517380Z ##[section]Starting: Upload CPU usage statistics
2019-09-18T03:47:53.7524810Z ==============================================================================
2019-09-18T03:47:53.7524980Z Task         : Bash
2019-09-18T03:47:53.7525120Z Description  : Run a Bash script on macOS, Linux, or Windows

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)

[bors]

💔 Test failed - checks-azure

[tmandry]

Closing in favor of #64570
@bors r-