Rollup of 1 pull requests

[Centril]

Successful merges:

• Remove some reexports in rustc_middle #70634 (Remove some reexports in rustc_middle)

Failed merges:

r? @ghost

[rust-highfive]

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.

2020-04-02T15:52:23.7751623Z ========================== Starting Command Output ===========================
2020-04-02T15:52:23.7754032Z [command]/bin/bash --noprofile --norc /home/vsts/work/_temp/76bb283b-1b00-4bc7-99df-3ba943183335.sh
2020-04-02T15:52:23.7754312Z 
2020-04-02T15:52:23.7758228Z ##[section]Finishing: Disable git automatic line ending conversion
2020-04-02T15:52:23.7776943Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70702/merge to s
2020-04-02T15:52:23.7780110Z Task         : Get sources
2020-04-02T15:52:23.7780418Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-04-02T15:52:23.7780734Z Version      : 1.0.0
2020-04-02T15:52:23.7780935Z Author       : Microsoft
---
2020-04-02T15:52:24.7701690Z ##[command]git remote add origin https://github.com/rust-lang/rust
2020-04-02T15:52:24.7708145Z ##[command]git config gc.auto 0
2020-04-02T15:52:24.7711709Z ##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
2020-04-02T15:52:24.7715010Z ##[command]git config --get-all http.proxy
2020-04-02T15:52:24.7720883Z ##[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/70702/merge:refs/remotes/pull/70702/merge
2020-04-02T15:52:25.2885564Z fatal: couldn't find remote ref refs/pull/70702/merge
2020-04-02T15:52:25.3821030Z ##[warning]Git fetch failed with exit code 128, back off 4.425 seconds before retry.
2020-04-02T15:52:29.7334617Z ##[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/70702/merge:refs/remotes/pull/70702/merge
2020-04-02T15:52:30.4108886Z fatal: couldn't find remote ref refs/pull/70702/merge
2020-04-02T15:52:30.4722013Z ##[warning]Git fetch failed with exit code 128, back off 7.508 seconds before retry.
2020-04-02T15:52:37.9241351Z ##[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/70702/merge:refs/remotes/pull/70702/merge
2020-04-02T15:52:38.7049096Z fatal: couldn't find remote ref refs/pull/70702/merge
2020-04-02T15:52:38.7633126Z ##[error]Git fetch failed with exit code: 128
2020-04-02T15:52:38.7647030Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70702/merge to s
2020-04-02T15:52:38.8066380Z ##[section]Starting: Checkout rust-lang/rust@refs/pull/70702/merge to s
2020-04-02T15:52:38.8072022Z Task         : Get sources
2020-04-02T15:52:38.8072370Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2020-04-02T15:52:38.8072730Z Version      : 1.0.0
2020-04-02T15:52:38.8072955Z Author       : Microsoft
2020-04-02T15:52:38.8072955Z Author       : Microsoft
2020-04-02T15:52:38.8073304Z Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2020-04-02T15:52:38.8073721Z ==============================================================================
2020-04-02T15:52:39.1100390Z ##[section]Finishing: Checkout rust-lang/rust@refs/pull/70702/merge to s
2020-04-02T15:52:39.1185645Z Cleaning up task key
2020-04-02T15:52:39.1187054Z Start cleaning up orphan processes.
2020-04-02T15:52:39.1327968Z ##[section]Finishing: Finalize Job
2020-04-02T15:52:39.1368093Z ##[section]Finishing: Linux x86_64-gnu-tools

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