nll-relate: improve hr opaque types support#142079
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bors merged 1 commit intorust-lang:masterfrom Aug 19, 2025
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This should currently not be user-facing outside of diagnostics as even if we successfully relate the opaque types, we don't support opaque types with non-param arguments and also require all member regions to be equal to the arguments or
'static. This means there's no way to end up with a placeholder in the hidden type.r? types