Stuart Cook 6473a0f02d
Rollup merge of #146564 - cjgillot:mir-nolen, r=scottmcm
Remove Rvalue::Len again.

Now that we have `RawPtrKind::FakeForPtrMetadata`, we can reimplement `Rvalue::Len` using `PtrMetadata(&raw const (fake) place)`.

r? ``@scottmcm``
2025-09-17 14:56:48 +10:00
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2025-09-16 22:23:19 +00:00
2025-09-16 22:44:35 +00:00
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