Rollup of 10 pull requests

[tmandry]

Successful merges:

• See also X-Link mem::{swap, take, replace} #75038 (See also X-Link mem::{swap, take, replace})
• docs(marker/copy): provide example for &T being Copy #75049 (docs(marker/copy): provide example for &T being Copy)
• Minor changes to Ipv4Addr #75110 (Minor changes to Ipv4Addr)
• Capture output from threads spawned in tests #75172 (Capture output from threads spawned in tests)
• BTreeMap: check some invariants in unit tests #75480 (BTreeMap: check some invariants in unit tests)
• Fix documentation error #75499 (Fix documentation error)
• Fix clashing_extern_declarations stack overflow for recursive types. #75554 (Fix clashing_extern_declarations stack overflow for recursive types.)
• Move to intra doc links for keyword documentation #75646 (Move to intra doc links for keyword documentation)
• Fix intra-doc links for inherent impls that are both lang items and not the default impl #75649 (Fix intra-doc links for inherent impls that are both lang items and not the default impl)
• Add doc examples coverage #75665 (Add doc examples coverage)

Failed merges:

• Resolve true and false as booleans #75652 (Resolve true and false as booleans)

r? @ghost

[tmandry]

@bors r+ p=5 rollup=never
@rustbot modify labels: +rollup

[bors]

📌 Commit 2a5b4b2 has been approved by tmandry

[bors]

⌛ Testing commit 2a5b4b2 with merge 9696f43b91a14f6b046dc9ee0aa925c0169dbda8...

[rust-log-analyzer]

The job dist-x86_64-netbsd 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.

[RUSTC-TIMING] addr2line test:false 0.406
[RUSTC-TIMING] core test:false 21.702
[RUSTC-TIMING] gimli test:false 5.157
[RUSTC-TIMING] object test:false 10.395
error: borrow of packed field is unsafe and requires unsafe function or block (error E0133)
    |
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913 |         self.inner.s_addr.hash(s)
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    |
    = note: `-D safe-packed-borrows` implied by `-D warnings`
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
    = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior
error: aborting due to previous error

[RUSTC-TIMING] std test:false 3.351
error: could not compile `std`.
---
== clock drift check ==
  local time: Tue Aug 18 23:33:21 UTC 2020
  network time: Tue, 18 Aug 2020 23:33:21 GMT
== end clock drift check ==
##[error]Process completed with exit code 1.
Terminate orphan process: pid (2808) (node)
Terminate orphan process: pid (2836) (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