Rollup of 8 pull requests

[pietroalbini]

Successful merges:

• Add test for #43398 #62994 (Add test for ICE getting discriminant of #[repr(i128)] enum #43398)
• Add tests for some issues #63259 (Add tests for some issues)
• bump rand in libcore/liballoc test suites #63261 (bump rand in libcore/liballoc test suites)
• doc: Reword deprecation message of MetadataExt::as_raw_stat #63327 (doc: Reword deprecation message of MetadataExt::as_raw_stat)
• Test conditional initialization validation in async fns #63331 (Test conditional initialization validation in async fns)
• Add an overflow check in truncate implementation for Unix. #63332 (Add an overflow check in truncate implementation for Unix.)
• Update to rustc-guide that passes toolstate #63334 (Update to rustc-guide that passes toolstate)
• Update books #63353 (Update books)

Failed merges:

r? @ghost

[pietroalbini]

@bors r+ p=8

[bors]

📌 Commit c33b89d has been approved by pietroalbini

[bors]

⌛ Testing commit c33b89d with merge 7f7fec7df25a1f615bbd90adf2862a2cc15db01a...

[bors]

💔 Test failed - checks-azure

[rust-highfive]

The job dist-android of your PR failed (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.

2019-08-07T20:53:52.0939776Z do so (now or later) by using -b with the checkout command again. Example:
2019-08-07T20:53:52.0939846Z 
2019-08-07T20:53:52.0940069Z   git checkout -b <new-branch-name>
2019-08-07T20:53:52.0940146Z 
2019-08-07T20:53:52.0940442Z HEAD is now at 7f7fec7df Auto merge of #63354 - pietroalbini:rollup-gzp7eop, r=pietroalbini
2019-08-07T20:53:52.1102974Z ##[section]Starting: Collect CPU-usage statistics in the background
2019-08-07T20:53:52.1105813Z ==============================================================================
2019-08-07T20:53:52.1105900Z Task         : Bash
2019-08-07T20:53:52.1106016Z Description  : Run a Bash script on macOS, Linux, or Windows
---
2019-08-07T22:04:15.6667723Z command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "arm-linux-androideabi" "-j" "2" "--release" "--locked" "--color" "always" "--features" "panic-unwind backtrace compiler-builtins-c" "--manifest-path" "/checkout/src/libstd/Cargo.toml" "--message-format" "json"
2019-08-07T22:04:15.6667965Z expected success, got: exit code: 101
2019-08-07T22:04:15.6679895Z failed to run: /checkout/obj/build/bootstrap/debug/bootstrap dist --target arm-linux-androideabi,armv7-linux-androideabi,thumbv7neon-linux-androideabi,i686-linux-android,aarch64-linux-android,x86_64-linux-android
2019-08-07T22:04:15.6680572Z Build completed unsuccessfully in 1:02:15
2019-08-07T22:04:17.0122697Z ##[error]Bash exited with code '1'.
2019-08-07T22:04:17.0162192Z ##[section]Starting: Upload CPU usage statistics
2019-08-07T22:04:17.0171924Z ==============================================================================
2019-08-07T22:04:17.0172021Z Task         : Bash
2019-08-07T22:04:17.0172112Z 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)

[tesuji]

#63332 failed.