…atch, r=BoxyUwU

Improve `DispatchFromDyn` and `CoerceUnsized` impl validation

* Disallow arbitrary 1-ZST fields in `DispatchFromDyn` -- only `PhantomData`, and 1-ZSTs that mention no params (which is needed to support, e.g., the `Global` alloctor in `Box<T, U = Global>`).
* Don't allow coercing between non-ZSTs to ZSTs (since the previous check wasn't actually checking the field tys were the same before checking the layout...)
* Normalize the field before checking it's `PhantomData`.

Fixes rust-lang#135215
Fixes rust-lang#135214
Fixes rust-lang#135220

r? `@BoxyUwU` or reassign

…atch, r=BoxyUwU

Improve `DispatchFromDyn` and `CoerceUnsized` impl validation

* Disallow arbitrary 1-ZST fields in `DispatchFromDyn` -- only `PhantomData`, and 1-ZSTs that mention no params (which is needed to support, e.g., the `Global` alloctor in `Box<T, U = Global>`).
* Don't allow coercing between non-ZSTs to ZSTs (since the previous check wasn't actually checking the field tys were the same before checking the layout...)
* Normalize the field before checking it's `PhantomData`.

Fixes rust-lang#135215
Fixes rust-lang#135214
Fixes rust-lang#135220

r? ``@BoxyUwU`` or reassign

…iaskrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#134940 (Make sure to scrape region constraints from deeply normalizing type outlives assumptions in borrowck)
 - rust-lang#135047 (Add gpu-kernel calling convention)
 - rust-lang#135228 (Improve `DispatchFromDyn` and `CoerceUnsized` impl validation)
 - rust-lang#135264 (Consider more erroneous layouts as `LayoutError::ReferencesError` to suppress spurious errors)
 - rust-lang#135302 (for purely return-type based searches, deprioritize clone-like functions)
 - rust-lang#135380 (Make sure we can produce `ConstArgHasWrongType` errors for valtree consts)
 - rust-lang#135425 (Do not consider traits that have unsatisfied const conditions to be conditionally const)

r? `@ghost`
`@rustbot` modify labels: rollup

…kingjubilee

Rollup of 11 pull requests

Successful merges:

 - rust-lang#134913 (bootstrap: do not rely on LIBRARY_PATH env variable)
 - rust-lang#134940 (Make sure to scrape region constraints from deeply normalizing type outlives assumptions in borrowck)
 - rust-lang#135228 (Improve `DispatchFromDyn` and `CoerceUnsized` impl validation)
 - rust-lang#135264 (Consider more erroneous layouts as `LayoutError::ReferencesError` to suppress spurious errors)
 - rust-lang#135302 (for purely return-type based searches, deprioritize clone-like functions)
 - rust-lang#135353 (re-add --disable-minification to rustdoc)
 - rust-lang#135380 (Make sure we can produce `ConstArgHasWrongType` errors for valtree consts)
 - rust-lang#135423 (Enforce syntactical stability of const traits in HIR)
 - rust-lang#135425 (Do not consider traits that have unsatisfied const conditions to be conditionally const)
 - rust-lang#135499 (fix underlining of hovered intra-doc links.)
 - rust-lang#135505 (Fix clippy lints in rustdoc)

r? `@ghost`
`@rustbot` modify labels: rollup