Dylan DPC 4dea3a295f Rollup merge of #108000 - y21:no-zero-init-for-uninhabited, r=jackh726 ...

lint: don't suggest MaybeUninit::assume_init for uninhabited types

Creating a zeroed uninhabited type such as `!` or an empty enum with `mem::zeroed()` (or transmuting `()` to `!`) currently triggers this lint:
```rs
warning: the type `!` does not permit zero-initialization
 --> test.rs:5:23
  |
5 |         let _val: ! = mem::zeroed();
  |                       ^^^^^^^^^^^^^
  |                       |
  |                       this code causes undefined behavior when executed
  |                       help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
  |
  = note: the `!` type has no valid value
```
The `MaybeUninit` suggestion in the help message seems confusing/useless for uninhabited types, as such a type cannot be fully initialized in the first place (as the note implies).
This PR limits this help message to inhabited types which can be initialized

2023-02-21 14:19:58 +05:30

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auxiliary

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heap

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simd

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stable-metric

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assign-to-static-within-other-static.rs

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conditional_array_execution.rs

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const_fn_ptr_fail2.rs

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duration_conversion.rs

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valid-const.rs

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