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refactor: In alter_ty_path, return on failed unpack#1820

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Rua:unpack-else
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refactor: In alter_ty_path, return on failed unpack#1820
Rua wants to merge 1 commit into
immunant:masterfrom
Rua:unpack-else

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@Rua

@Rua Rua commented May 22, 2026

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This is a fix, but I don't know if it's actually the correct fix.

}

unpack!([&mut t.kind] TyKind::Path(qself, path));
unpack!([&mut t.kind] TyKind::Path(qself, path); return);

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Silencing errors isn't really the way to fix issues, let's investigate this.

Any idea why a type would appear as hir::TyKind::Path in the HIR, but as an Rptr in the AST? Maybe an alias? Could you print out which type this is?

@Rua Rua May 23, 2026

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I printed out qpath when t.kind isn't TyKind::Path:

if !matches!(t.kind, TyKind::Path(..)) {
    panic!("{qpath:?}");
}

and got:

Resolved(
    None,
    Path {
        span: Span {
            lo: BytePos(129233),
            hi: BytePos(129242),
            ctxt: #57
        },
        res: PrimTy(
            Bool
        ),
        segments: [
            PathSegment {
                ident: bool#57,
                hir_id: HirId {
                    owner: OwnerId {
                        def_id: DefId {
                            krate: crate0,
                            index: DefIndex(
                                50254
                            )
                        }
                    },
                    local_id: 25
                },
                res: PrimTy(
                    Bool
                ),
                args: None,
                infer_args: false
            }
        ]
    }
)

So it's... bool? Not sure how to make sense of that one.

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Random thought: if the refactorer is making modifications to the AST, what happens to the HIR? Is it modified in parallel? If not, what keeps the two in sync? Could that be the issue here?

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The HIR is not preserved. The refactorer is expected to make independent modifications, or reload the crate if it makes changes that impact the HIR (and needs it to be correct).

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Refactorer crashes if the processed code has derive(PartialEq, Eq)

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