Rollup of 4 pull requests

[Centril]

Successful merges:

• Add functions for building raw slices to libcore  #60667 ( Add functions for building raw slices to libcore )
• Support cfg and cfg_attr on generic parameters #61547 (Support cfg and cfg_attr on generic parameters)
• Update rustfmt and rls #61861 (Update rustfmt and rls)
• Make Place::ty iterate #61940 (Make Place::ty iterate)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=4

[bors]

📌 Commit bf6c505 has been approved by Centril

[bors]

⌛ Testing commit bf6c505 with merge c66f28fb7423bb88883528b82969d2098a89c700...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

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.

Attempting to download https://rust-lang-ci-sccache2.s3.amazonaws.com/docker/eb70c6d02a75cdd10800aec521e3d88a4ccc07be26a0174fd0272bd18f356ea416acf3708b0fa3393b5147a52759b8914811d46d34150eb8b91512c026d7a4b6
[00:07:52] Attempting with retry: curl -y 30 -Y 10 --connect-timeout 30 -f -L -C - -o /tmp/rustci_docker_cache https://rust-lang-ci-sccache2.s3.amazonaws.com/docker/eb70c6d02a75cdd10800aec521e3d88a4ccc07be26a0174fd0272bd18f356ea416acf3708b0fa3393b5147a52759b8914811d46d34150eb8b91512c026d7a4b6
[00:07:52]   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
[00:07:52]                                  Dload  Upload   Total   Spent    Left  Speed
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 No output has been received in the last 30m0s

[bors]

⌛ Testing commit bf6c505 with merge 5e0c6a6...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: Centril
Pushing 5e0c6a6 to master...