[beta] backports

[Mark-Simulacrum]

• Fix regionck failure when converting Index to IndexMut Fix regionck failure when converting Index to IndexMut #74960
• Update RELEASES.md for 1.46.0 Update RELEASES.md for 1.46.0 #74744
• allow escaping bound vars when normalizing ty::Opaque allow escaping bound vars when normalizing ty::Opaque #75443
• Don't immediately error for cycles during normalization #75494

r? @ghost

[Mark-Simulacrum]

Not approving just yet -- there will likely be at least one more beta-accepted PR after tomorrow's compiler team meeting, which I will include in this PR.

[Mark-Simulacrum]

@bors r+ rollup=never p=100

[bors]

📌 Commit 1101496 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 1101496 with merge e47625a1c54c0ad28380f33f20d1b27e98e7c3ba...

[rust-log-analyzer]

The job mingw-check of 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.

Build completed successfully in 0:01:36
+ /scripts/validate-toolstate.sh
Cloning into 'rust-toolstate'...
<Nothing changed>
error: embedded-book maintainer @korken89 is not assignable in the rust-lang/rust repo
error: embedded-book maintainer @ryankurte is not assignable in the rust-lang/rust repo
error: embedded-book maintainer @thejpster is not assignable in the rust-lang/rust repo

  To be assignable, a person needs to be explicitly listed as a
  collaborator in the repository settings. The simple way to
  fix this is to ask someone with 'admin' privileges on the repo
  to add the person or whole team as a collaborator with 'read'
  privileges. Those privileges don't grant any extra permissions
  so it's safe to apply them.
The build will fail due to this.
== clock drift check ==
  local time: Thu Aug 20 23:03:54 UTC 2020
  network time: Thu, 20 Aug 2020 23:03:54 GMT
  network time: Thu, 20 Aug 2020 23:03:54 GMT
== end clock drift check ==
##[error]Process completed with exit code 1.
Terminate orphan process: pid (6363) (node)
Terminate orphan process: pid (6391) (python)

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 @rust-lang/infra. (Feature Requests)

[bors]

💔 Test failed - checks-actions

[Mark-Simulacrum]

Pushed a commit dropping those reviewers from the embedded book, it really doesn't matter since this branch will get one or two more additional commits at most I suspect.

@bors r+

[bors]

📌 Commit 798ba0e has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 798ba0e with merge 0cd4903fb280c52dac8495021b52a1481935405d...

[rust-log-analyzer]

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.

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 @rust-lang/infra. (Feature Requests)

[bors]

💔 Test failed - checks-actions

[Mark-Simulacrum]

@bors r+

[bors]

📌 Commit 68d6e56 has been approved by Mark-Simulacrum

[bors]

⌛ Testing commit 68d6e56 with merge cfbc6d4...

[bors]

☀️ Test successful - checks-actions, checks-azure
Approved by: Mark-Simulacrum
Pushing cfbc6d4 to beta...