Also update Node to v16.9.0, es-check to 6.1.1, and eslint to 8.6.0.

This reduces clutter on doc pages.

…pointee, r=jackh726

Normalize struct tail type when checking Pointee trait

Let's go ahead and implement the FIXMEs by properly normalizing the struct-tail type when satisfying a Pointee obligation. This should fix the ICE when we try to calculate a layout depending on `<Ty as Pointee>::Metadata` later.
Fixes rust-lang#92128

Additionally, mark the obligation as ambiguous if there are any infer types in that struct-tail type. This has the effect of causing `<_ as Pointee>::Metadata` to be properly replaced with an infer variable ([here](https://github.com/rust-lang/rust/blob/master/compiler/rustc_trait_selection/src/traits/project.rs#L813)) and registered as an obligation... this turns out to be very important in unifying function parameters with formals that are assoc types.

Fixes rust-lang#91446
Fixes rust-lang#92248

…Gomez

Move crate drop-down to search results page

This reduces clutter on doc pages.

Part of rust-lang#59840

r? ``@GuillaumeGomez``

Demo: https://rustdoc.crud.net/jsha/crates-in-results/std/index.html?search=str

…=cjgillot

Don't resolve blocks in foreign functions

Although it is an error for a foreign function to have a block, it is still possible at the level of the AST. rust-lang#74204 made AST lowering skip over blocks belonging to foreign functions, since they're invalid. However, resolve still treated these blocks normally, resulting in a mismatch between the HIR and resolve, which could cause an ICE under certain circumstances. This PR changes resolve to skip over blocks belonging to foreign functions, as AST lowering does.

Fixes rust-lang#91370.

r? `@cjgillot`

Allow unwinding from OOM hooks

This is split off from rust-lang#88098 and contains just the bare minimum to allow specifying a custom OOM hook with `set_alloc_error_hook` which unwinds instead of aborting.

See rust-lang#88098 for an actual command-line flag which switches the default OOM behavior to unwind instead of aborting.

Previous perf results show a negligible impact on performance.

…ant-count, r=the8472

Add note about non_exhaustive to variant_count

Since `variant_count` isn't returning something opaque, I thought it makes sense to explicitly call out that its return value may change for some enums.

cc rust-lang#73662

…htriplett

Add some missing `#[must_use]` to some `f{32,64}` operations

This PR adds `#[must_use]` to the following methods:
 - `f32::recip`
 - `f32::max`
 - `f32::min`
 - `f32::maximum`
 - `f32::minimum`
 and their equivalents in `f64`.
 These methods all produce a new value without modifying the original and so are pointless to call without using the result.

…-inline-style, r=jsha

Create CSS class instead of using inline style for search results

I saw this change in the update you proposed in rust-lang#92404. :)

r? `@jsha`