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Manually order `DefId` on 64-bit big-endian `DefId` uses different field orders on 64-bit big-endian vs. others, in order to optimize its `Hash` implementation. However, that also made it derive different lexical ordering for `PartialOrd` and `Ord`. That caused spurious differences wherever `DefId`s are sorted, like the candidate sources list in `report_method_error`. Now we manually implement `PartialOrd` and `Ord` on 64-bit big-endian to match the same lexical ordering as other targets, fixing at least one test, `src/test/ui/methods/method-ambig-two-traits-cross-crate.rs`. |
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