Rollup of 10 pull requests

[Dylan-DPC-zz]

Successful merges:

• Pointer printing: do not print 0 offset #71741 (Pointer printing: do not print 0 offset)
• Add strikethrough support to rustdoc #71928 (Add strikethrough support to rustdoc)
• Deprecated emoji #72014 (Deprecated emoji)
• Use CDN for ci-caches on download #72027 (Use CDN for ci-caches on download)
• use min_specialization for some rustc crates where it requires no changes #72044 (use min_specialization for some rustc crates where it requires no changes)
• display ConstKind::Param #72052 (display ConstKind::Param)
• Emit a warning when optimization fuel runs out #72067 (Emit a warning when optimization fuel runs out)
• doc: minus (U+2212) instead of dash (U+002D) for negative infinity #72072 (doc: minus (U+2212) instead of dash (U+002D) for negative infinity)
• Improve E0571 wording #72077 (Improve E0571 wording)
• Clean up E0579 explanation #72107 (Clean up E0579 explanation)

Failed merges:

r? @ghost

[rust-highfive]

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.

##[section]Starting: Linux mingw-check
##[section]Starting: Initialize job
Agent name: 'Azure Pipelines 2'
Agent machine name: 'fv-az578'
Current agent version: '2.168.2'
##[group]Operating System
16.04.6
LTS
LTS
##[endgroup]
##[group]Virtual Environment
Environment: ubuntu-16.04
Version: 20200430.2
Included Software: https://github.com/actions/virtual-environments/blob/ubuntu16/20200430.2/images/linux/Ubuntu1604-README.md
##[endgroup]
Agent running as: 'vsts'
Prepare build directory.
Set build variables.
Download all required tasks.
Download all required tasks.
Downloading task: Bash (3.163.1)
Checking job knob settings.
   Knob: AgentToolsDirectory = /opt/hostedtoolcache Source: ${AGENT_TOOLSDIRECTORY} 
   Knob: AgentPerflog = /home/vsts/perflog Source: ${VSTS_AGENT_PERFLOG} 
Start tracking orphan processes.
##[section]Finishing: Initialize job
##[section]Starting: Configure Job Name
==============================================================================
---
========================== Starting Command Output ===========================
[command]/bin/bash --noprofile --norc /home/vsts/work/_temp/eff311e6-c7fc-40c4-ba34-cff847522153.sh

##[section]Finishing: Disable git automatic line ending conversion
##[section]Starting: Checkout rust-lang/rust@refs/pull/72112/merge to s
Task         : Get sources
Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
Version      : 1.0.0
Author       : Microsoft
---
##[command]git remote add origin https://github.com/rust-lang/rust
##[command]git config gc.auto 0
##[command]git config --get-all http.https://github.com/rust-lang/rust.extraheader
##[command]git config --get-all http.proxy
##[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/72112/merge:refs/remotes/pull/72112/merge
---
 ---> 3adb0605cc65
Step 6/7 : ENV RUN_CHECK_WITH_PARALLEL_QUERIES 1
 ---> Using cache
 ---> 28dbc326cb7f
Step 7/7 : ENV SCRIPT python3 ../x.py test src/tools/expand-yaml-anchors &&            python3 ../x.py check --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu &&            python3 ../x.py build --stage 0 src/tools/build-manifest &&            python3 ../x.py test --stage 0 src/tools/compiletest &&            python3 ../x.py test src/tools/tidy &&            python3 ../x.py doc --stage 0 src/libstd &&            /scripts/validate-toolstate.sh
 ---> 537a01811900
Successfully built 537a01811900
Successfully tagged rust-ci:latest
Built container sha256:537a018119009dc218456238dec90b5530050db1e2a1e166550c218003f6159d
---
    Checking rustc_feature v0.0.0 (/checkout/src/librustc_feature)
    Checking fmt_macros v0.0.0 (/checkout/src/libfmt_macros)
    Checking rustc_ast_pretty v0.0.0 (/checkout/src/librustc_ast_pretty)
    Checking rustc_hir v0.0.0 (/checkout/src/librustc_hir)
    Checking rustc_query_system v0.0.0 (/checkout/src/librustc_query_system)
    Checking chalk-rust-ir v0.10.0
    Checking rustc_parse v0.0.0 (/checkout/src/librustc_parse)
    Checking rustc_hir_pretty v0.0.0 (/checkout/src/librustc_hir_pretty)
    Checking rustc_ast_lowering v0.0.0 (/checkout/src/librustc_ast_lowering)
    Checking rustc_ast_lowering v0.0.0 (/checkout/src/librustc_ast_lowering)
    Checking chalk-solve v0.10.0
error[E0107]: wrong number of type arguments: expected at most 1, found 2
  --> src/librustc_middle/mir/interpret/pointer.rs:94:11
   |
94 |     ptr: &Pointer<Tag, Id>,
   |           ^^^^^^^^^^^^^^^^ expected at most 1 type argument
error: aborting due to previous error

For more information about this error, try `rustc --explain E0107`.
error: could not compile `rustc_middle`.
error: could not compile `rustc_middle`.

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "check" "--target" "x86_64-unknown-linux-gnu" "-Zbinary-dep-depinfo" "-j" "2" "--release" "--color" "always" "--features" " llvm" "--manifest-path" "/checkout/src/rustc/Cargo.toml" "--message-format" "json-render-diagnostics"
failed to run: /checkout/obj/build/bootstrap/debug/bootstrap check
Build completed unsuccessfully in 0:04:41
== clock drift check ==
  local time: Mon May 11 15:41:15 UTC 2020
  local time: Mon May 11 15:41:15 UTC 2020
  network time: Mon, 11 May 2020 15:41:15 GMT
== end clock drift check ==

##[error]Bash exited with code '1'.
##[section]Finishing: Run build
##[section]Starting: Checkout rust-lang/rust@refs/pull/72112/merge to s
Task         : Get sources
Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
Version      : 1.0.0
Author       : Microsoft
Author       : Microsoft
Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
==============================================================================
Cleaning any cached credential from repository: rust-lang/rust (GitHub)
##[section]Finishing: Checkout rust-lang/rust@refs/pull/72112/merge to s
Cleaning up task key
Start cleaning up orphan processes.
Terminate orphan process: pid (3629) (python)
##[section]Finishing: Finalize Job

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