rustdoc: sort unstable items first

[lolbinarycat]

Finally tackling this again now that the search system refactor is done. The tests and the general approach were taken from the original PR.

[rustbot]

Some changes occurred in HTML/CSS/JS.

cc @GuillaumeGomez, @lolbinarycat

[rustbot]

r? @notriddle

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[rust-log-analyzer]

The job aarch64-gnu-llvm-20-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

Testing asrawfd.js ... OK
Testing basic.js ... OK
Testing const-is-nullary-func.js ... OK
Testing core-transmute.js ... FAILED
[ query `generic:T -> generic:U`]==> '{"path":"core::mem","name":"transmute"}' was supposed to be before '{"crate":"core","name":"simd_cast","path":"core::intrinsics::simd","exactPath":"core::intrinsics::simd","ty":7,"type":{"inputs":[{"id":-1,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"output":[{"id":-2,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"where_clause":[[],[]]},"paramNames":["T","U"],"dist":2,"path_dist":0,"index":-1,"desc":"Numerically casts a vector, elementwise.","item":{"id":36082,"crate":"core","ty":7,"name":"simd_cast","normalizedName":"simdcast","modulePath":"core::intrinsics::simd","exactModulePath":"core::intrinsics::simd","entry":{"krate":10481,"ty":7,"modulePath":15288,"exactModulePath":null,"parent":null,"traitParent":null,"deprecated":false,"unstable":true,"associatedItemDisambiguator":null},"path":null,"functionData":{"functionSignature":{"inputs":[{"id":-1,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"output":[{"id":-2,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"where_clause":[[],[]]},"paramNames":["T","U"],"elemCount":2},"deprecated":false,"unstable":true,"parent":null,"traitParent":null},"displayPath":"<span>core::</span><span>intrinsics::</span><span>simd::</span>","fullPath":"core::intrinsics::simd::simd_cast|7","traitPath":null,"href":"../core/intrinsics/simd/fn.simd_cast.html","displayTypeSignature":{"type":["","T"," -> ","U"],"mappedNames":{},"whereClause":{}},"id":36082,"elems":[{"name":"T","id":-1,"typeFilter":26,"generics":[],"bindings":{},"fullPath":["t"],"pathLast":"t","normalizedPathLast":"t","pathWithoutLast":[]}],"returned":[{"name":"U","id":-2,"typeFilter":26,"generics":[],"bindings":{},"fullPath":["u"],"pathLast":"u","normalizedPathLast":"u","pathWithoutLast":[]}],"is_alias":false,"displayType":"`T` -> `U`","displayMappedNames":"T = T, U = U","displayWhereClause":""}'
Testing deduplication.js ... OK
Testing doc-alias-use.js ... OK
Testing enum-option.js ... OK
Testing exact-case.js ... OK
Testing field-is-unary-func.js ... OK
---
Testing struct-vec.js ... OK
Testing trait-unbox.js ... OK
Testing transmute-fail.js ... OK
Testing transmute.js ... FAILED
[ query `generic:T -> generic:U`]==> '{"path":"std::mem","name":"transmute"}' was supposed to be before '{"crate":"std","name":"simd_cast","path":"std::intrinsics::simd","exactPath":"core::intrinsics::simd","ty":7,"type":{"inputs":[{"id":-1,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"output":[{"id":-2,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"where_clause":[[],[]]},"paramNames":["T","U"],"dist":2,"path_dist":0,"index":-1,"desc":"Numerically casts a vector, elementwise.","item":{"id":36083,"crate":"std","ty":7,"name":"simd_cast","normalizedName":"simdcast","modulePath":"std::intrinsics::simd","exactModulePath":"core::intrinsics::simd","entry":{"krate":9305,"ty":7,"modulePath":15291,"exactModulePath":15288,"parent":null,"traitParent":null,"deprecated":false,"unstable":true,"associatedItemDisambiguator":null},"path":null,"functionData":{"functionSignature":{"inputs":[{"id":-1,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"output":[{"id":-2,"name":"","ty":26,"path":null,"exactPath":null,"generics":[],"bindings":{},"unboxFlag":true}],"where_clause":[[],[]]},"paramNames":["T","U"],"elemCount":2},"deprecated":false,"unstable":true,"parent":null,"traitParent":null},"displayPath":"<span>std::</span><span>intrinsics::</span><span>simd::</span>","fullPath":"core::intrinsics::simd::simd_cast|7","traitPath":null,"href":"../std/intrinsics/simd/fn.simd_cast.html","displayTypeSignature":{"type":["","T"," -> ","U"],"mappedNames":{},"whereClause":{}},"id":36083,"elems":[{"name":"T","id":-1,"typeFilter":26,"generics":[],"bindings":{},"fullPath":["t"],"pathLast":"t","normalizedPathLast":"t","pathWithoutLast":[]}],"returned":[{"name":"U","id":-2,"typeFilter":26,"generics":[],"bindings":{},"fullPath":["u"],"pathLast":"u","normalizedPathLast":"u","pathWithoutLast":[]}],"is_alias":false,"displayType":"`T` -> `U`","displayMappedNames":"T = T, U = U","displayWhereClause":""}'
Testing typed-query.js ... OK
Testing unbox-type-result.js ... OK
Testing vec-new.js ... OK
Testing vec-type-signatures.js ... OK
Testing write.js ... OK
Bootstrap failed while executing `--stage 2 test --skip compiler --skip src`
Command `/usr/bin/node /checkout/src/tools/rustdoc-js/tester.js --crate-name std --resource-suffix 1.93.0 --doc-folder /checkout/obj/build/aarch64-unknown-linux-gnu/doc --test-folder /checkout/tests/rustdoc-js-std` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/test.rs:1029:27
Executed at: src/bootstrap/src/core/build_steps/test.rs:1056:17

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:44:40
  local time: Sat Nov 29 19:01:19 UTC 2025
  network time: Sat, 29 Nov 2025 19:01:20 GMT
##[error]Process completed with exit code 1.
##[group]Run echo "disk usage:"

[notriddle]

A simple nit pick, but I think the release team would dislike a PR title that's backwards from the actual behavior.

The implementation itself seems okay.

View changes since this review

[notriddle]

The PR title says it sorts unstable items first. This test seems to show the unstable item appearing last. Which is it?