make feature name plural: const_fn_trait_bound → const_fn_trait_bounds

[RalfJung]

Seems like we usually use plural for this -- and even though I picked the name I also keep expecting it to be plural.^^
No nightly has been released yet with the singular name (Cc #84577), so if we are quick I think this will be rather painless.

Cc @oli-obk

[rust-highfive]

r? @estebank

(rust-highfive has picked a reviewer for you, use r? to override)

[oli-obk]

@bors r+

[bors]

📌 Commit 6e349d1 has been approved by oli-obk

[RalfJung]

Okay turns out there was a nightly, my rustup just skipped it due to missing tools.
Do we still want to go ahead with the rename (and just hope that not too many people start using this feature flag today)?

[bors]

⌛ Testing commit 6e349d1 with merge 7a71a9a89069b05f047f313f2c649aa97f4f4b8c...

[rust-log-analyzer]

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  2  516M    2 13.6M    0     0  24.6M      0  0:00:20 --:--:--  0:00:20 24.7M
curl: (56) OpenSSL SSL_read: Connection was reset, errno 10054

gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
##[error]Process completed with exit code 2.
[command]"C:\Program Files\Git\bin\git.exe" version
git version 2.31.1.windows.1
[command]"C:\Program Files\Git\bin\git.exe" config --local --name-only --get-regexp core\.sshCommand
[command]"C:\Program Files\Git\bin\git.exe" submodule foreach --recursive "git config --local --name-only --get-regexp 'core\.sshCommand' && git config --local --unset-all 'core.sshCommand' || :"
[command]"C:\Program Files\Git\bin\git.exe" submodule foreach --recursive "git config --local --name-only --get-regexp 'core\.sshCommand' && git config --local --unset-all 'core.sshCommand' || :"
[command]"C:\Program Files\Git\bin\git.exe" config --local --name-only --get-regexp http\.https\:\/\/github\.com\/\.extraheader
http.https://github.com/.extraheader
[command]"C:\Program Files\Git\bin\git.exe" config --local --unset-all http.https://github.com/.extraheader
[command]"C:\Program Files\Git\bin\git.exe" submodule foreach --recursive "git config --local --name-only --get-regexp 'http\.https\:\/\/github\.com\/\.extraheader' && git config --local --unset-all 'http.https://github.com/.extraheader' || :"
Cleaning up orphan processes
Terminate orphan process: pid (8012) (node)
Terminate orphan process: pid (8136) (python)
Terminate orphan process: pid (2880) (vctip)

[bors]

💔 Test failed - checks-actions

[RalfJung]

Transient failure:

Run src/ci/scripts/install-clang.sh
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  2  516M    2 13.6M    0     0  24.6M      0  0:00:20 --:--:--  0:00:20 24.7M
curl: (56) OpenSSL SSL_read: Connection was reset, errno 10054

@bors retry

[bors]

⌛ Testing commit 6e349d1 with merge dfaeef409902931d5293d921bbc52369b3bcac70...

[rust-log-analyzer]

The job dist-x86_64-linux failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  4273  100  4273    0     0  12987      0 --:--:-- --:--:-- --:--:-- 12987
+ RUSTC_BOOTSTRAP=1
+ ./build/x86_64-unknown-linux-gnu/stage2/bin/rustc --edition=2018 --crate-type=lib /tmp/ctfe-stress-4.rs
error[E0658]: trait bounds other than `Sized` on const fn parameters are unstable
   |
   |
67 | expensive_static!(UNSIZE_TRAIT: &'static dyn Trait = &42u32; [4 16 16 16 16 16]);
   |
   = note: see issue #57563 <https://github.com/rust-lang/rust/issues/57563> for more information
   = help: add `#![feature(const_fn_trait_bounds)]` to the crate attributes to enable

[bors]

💔 Test failed - checks-actions

[RalfJung]

Argh, I forgot about the CTFE stress test...
well I guess we are stuck with the singular feature name then. shrug this doesn't seem worth the effort.