Rollup of 5 pull requests

[Centril]

Successful merges:

• Improve Rustdoc's handling of procedural macros #62855 (Improve Rustdoc's handling of procedural macros)
• Do not suggest .try_into() on i32::from(x) #63813 (Do not suggest .try_into() on i32::from(x))
• Ensure miri can do bit ops on pointer values #63839 (Ensure miri can do bit ops on pointer values)
• Modifies how Arg, Arm, Field, FieldPattern and Variant are visited #63854 (Modifies how Arg, Arm, Field, FieldPattern and Variant are visited)
• Refactor feature gates #63855 (Refactor feature gates)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=5 rollup=never

[bors]

📌 Commit 1d44b85 has been approved by Centril

[rust-highfive]

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.

2019-08-24T19:05:29.3716837Z ##[command]git remote add origin https://github.com/rust-lang/rust
2019-08-24T19:05:29.3926604Z ##[command]git config gc.auto 0
2019-08-24T19:05:29.4003198Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2019-08-24T19:05:29.4065047Z ##[command]git config --get-all http.proxy
2019-08-24T19:05:30.1765647Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/63863/merge:refs/remotes/pull/63863/merge
2019-08-24T19:05:30.2326372Z fatal: couldn't find remote ref refs/pull/63863/merge
2019-08-24T19:05:30.3470331Z ##[warning]Git fetch failed with exit code 128, back off 4.315 seconds before retry.
2019-08-24T19:05:34.5909605Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/63863/merge:refs/remotes/pull/63863/merge
2019-08-24T19:05:35.2045439Z fatal: couldn't find remote ref refs/pull/63863/merge
2019-08-24T19:05:35.2779647Z ##[warning]Git fetch failed with exit code 128, back off 6.301 seconds before retry.
2019-08-24T19:05:41.5117102Z ##[command]git -c http.extraheader="AUTHORIZATION: basic ***" fetch --force --tags --prune --progress --no-recurse-submodules --depth=2 origin +refs/heads/*:refs/remotes/origin/* +refs/pull/63863/merge:refs/remotes/pull/63863/merge
2019-08-24T19:05:42.1276230Z fatal: couldn't find remote ref refs/pull/63863/merge
2019-08-24T19:05:42.1858125Z ##[error]Git fetch failed with exit code: 128
2019-08-24T19:05:42.2141188Z ##[section]Starting: Checkout
2019-08-24T19:05:42.2142704Z ==============================================================================
2019-08-24T19:05:42.2142765Z Task         : Get sources
2019-08-24T19:05:42.2142806Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.

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