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Don't generate invalid non-zero integers #214

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@evanrelf evanrelf commented Mar 9, 2025

For example, the instance for NonZeroUsize was generating code equivalent to this:

NonZeroUsize::new(u.arbitrary::<usize>()?)?

But u.arbitrary::<usize>() can generate 0, which will fail.

For example, the instance for `NonZeroUsize` was generating code
equivalent to this:

```rust
NonZeroUsize::new(u.arbitrary::<usize>()?)?
```

But `u.arbitrary::<usize>()` can generate 0, which will fail.
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