Rollup of 4 pull requests

[jdonszelmann]

Successful merges:

• Convert no_std and no_core to the new attribute infrastructure #146389 (Convert no_std and no_core to the new attribute infrastructure)
• Improve alloc::Layout coverage #146452 (Improve alloc::Layout coverage)
• Revert "Constify SystemTime methods" #146473 (Revert "Constify SystemTime methods")
• Improve core::char coverage #146477 (Improve core::char coverage)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[jdonszelmann]

@bors r+ p=5 rollup=never

[bors]

📌 Commit 7078e76 has been approved by jdonszelmann

It is now in the queue for this repository.

[bors]

⌛ Testing commit 7078e76 with merge 16288b8...

[rust-log-analyzer]

The job dist-various-2 failed! Check out the build log: (web) (plain enhanced) (plain)

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

error: `Sub` is not yet stable as a const trait
  --> library/std/src/sys/pal/wasip2/time.rs:56:25
   |
56 |             None => Err(other.0 - self.0),
   |                         ^^^^^^^^^^^^^^^^
   |
help: add `#![feature(const_ops)]` to the crate attributes to enable
  --> library/std/src/lib.rs:432:1
   |
432+ #![feature(const_ops)]
   |

error: `Try` is not yet stable as a const trait
  --> library/std/src/sys/pal/wasip2/time.rs:62:25
   |
62 |         Some(SystemTime(self.0.checked_add(*other)?))
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: add `#![feature(const_try)]` to the crate attributes to enable
  --> library/std/src/lib.rs:432:1
   |
432+ #![feature(const_try)]
   |

error: `FromResidual` is not yet stable as a const trait
  --> library/std/src/sys/pal/wasip2/time.rs:62:25
   |
62 |         Some(SystemTime(self.0.checked_add(*other)?))
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: add `#![feature(const_try)]` to the crate attributes to enable
  --> library/std/src/lib.rs:432:1
   |
432+ #![feature(const_try)]
   |

error: `Try` is not yet stable as a const trait
  --> library/std/src/sys/pal/wasip2/time.rs:67:25
   |
67 |         Some(SystemTime(self.0.checked_sub(*other)?))
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: add `#![feature(const_try)]` to the crate attributes to enable
  --> library/std/src/lib.rs:432:1
   |
432+ #![feature(const_try)]
   |

error: `FromResidual` is not yet stable as a const trait
  --> library/std/src/sys/pal/wasip2/time.rs:67:25
   |
67 |         Some(SystemTime(self.0.checked_sub(*other)?))
   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
help: add `#![feature(const_try)]` to the crate attributes to enable
  --> library/std/src/lib.rs:432:1
   |

[bors]

💔 Test failed - checks-actions

[jieyouxu]

Yeah, seems like #146473.