fix(debuginfo): disable overflow check for recursive non-enum types

[godzie44]

Commit b10edb4 introduce an overflow check when generating debuginfo for expanding recursive types. While this check works correctly for enums, it can incorrectly prune valid debug information for structures.

For example see #143241 (#143241 (comment)). Furthermore, for structures such check does not make sense, since structures with recursively expanding types simply will not compile (there is a hir_analysis_recursive_generic_parameter for that).

[rustbot]

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[fee1-dead]

r? compiler

[fee1-dead]

cc @wesleywiser and @adwinwhite, this fixes regression #143241 most possibly caused by #138599

This should probably be tested

[tmiasko]

In principle, the original issue also applies to structs. For example:

use std::marker::PhantomData;

pub struct AB<T: 'static> {
    pub a: PhantomData<T>,
    pub b: *const AB<(T, T)>,
}

fn main() {
    std::hint::black_box(AB::<()> { a: PhantomData, b: std::ptr::null() });
}

[godzie44]

Sad, i miss this example before.

Btw, without the pub a: PhantomData<T> field, the hir_analysis_recursive_generic_parameter diagnostic is triggered and example are not complied. There may be some inconsistency here, according to hir_analysis_recursive_generic_parameter check?

[petrochenkov]

r? @wesleywiser as the reviewer of #138599

[rustbot]

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