Add Unpin to std prelude, not just core

[cramertj]

r? @alexcrichton

[cramertj]

(note to reviewers: this is just a bugfix to the API that was exposed previously)

[SimonSapin]

I’ll assume that the since value of #[stable] attributes doesn’t matter on re-exports.

@bors r+

[bors]

📌 Commit 11f4d3e has been approved by SimonSapin

[bors]

⌛ Testing commit 11f4d3e with merge b26e296d04f9d3db7b8e0488acc6a7799bf81c2c...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-i586-gnu-i586-i686-musl of your PR failed on Travis (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.

[01:19:42] test atomic::uint_xor ... ok
[01:19:42] test cell::cell_default ... ok
[01:19:42] test cell::as_ptr ... ok
[01:19:42] test atomic::uint_or ... ok
No output has been received in the last 30m0s, this potentially indicates a stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated

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)

[Centril]

@bors retry

[bors]

⌛ Testing commit 11f4d3e with merge 5e3fa89dfc7bf0ec41d252daeedadae8f8646702...

[bors]

💔 Test failed - status-travis

[rust-highfive]

The job dist-i686-freebsd of your PR failed on Travis (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.

Building stage2 tool cargo (i686-unknown-freebsd)
[01:15:27]  Downloading crates ...
[01:15:47] warning: spurious network error (2 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:16:08] warning: spurious network error (1 tries remaining): [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:16:28] error: failed to download from `https://crates.io/api/v1/crates/openssl-src/111.1.0+1.1.1a/download`
[01:16:28] Caused by:
[01:16:28]   [6] Couldn't resolve host name (Could not resolve host: crates.io)
[01:16:28] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "i686-unknown-freebsd" "-j" "4" "--release" "--locked" "--color" "always" "--manifest-path" "/checkout/src/tools/cargo/Cargo.toml" "--features" "rustc-workspace-hack/all-static" "--message-format" "json"
[01:16:28] expected success, got: exit code: 101
---
travis_time:end:003c5a36:start=1545979869302975644,finish=1545979869315334977,duration=12359333
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:025b2d24
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:0a11c024
travis_time:start:0a11c024
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:07d360d4
$ dmesg | grep -i kill

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)

[kennytm]

@bors retry

[bors]

⌛ Testing commit 11f4d3e with merge 48742c6...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: SimonSapin
Pushing 48742c6 to master...