Auto merge of #106266 - matthiaskrgr:rollup-cxrdbzy, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #104531 (Provide a better error and a suggestion for `Fn` traits with lifetime params)
 - #105899 (`./x doc library --open` opens `std`)
 - #106190 (Account for multiple multiline spans with empty padding)
 - #106202 (Trim more paths in obligation types)
 - #106234 (rustdoc: simplify settings, help, and copy button CSS by not reusing)
 - #106236 (docs/test: add docs and a UI test for `E0514` and `E0519`)
 - #106259 (Update Clippy)
 - #106260 (Fix index out of bounds issues in rustdoc)
 - #106263 (Formatter should not try to format non-Rust files)

Failed merges:

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

src/librustdoc/clean/types.rs

@@ -1740,7 +1740,7 @@ impl Type {
     fn inner_def_id(&self, cache: Option<&Cache>) -> Option<DefId> {
         let t: PrimitiveType = match *self {
             Type::Path { ref path } => return Some(path.def_id()),
-            DynTrait(ref bounds, _) => return Some(bounds[0].trait_.def_id()),
+            DynTrait(ref bounds, _) => return bounds.get(0).map(|b| b.trait_.def_id()),
             Primitive(p) => return cache.and_then(|c| c.primitive_locations.get(&p).cloned()),
             BorrowedRef { type_: box Generic(..), .. } => PrimitiveType::Reference,
             BorrowedRef { ref type_, .. } => return type_.inner_def_id(cache),

src/librustdoc/html/render/search_index.rs

@@ -322,8 +322,7 @@ fn get_index_type_id(clean_type: &clean::Type) -> Option<RenderTypeId> {
     match *clean_type {
         clean::Type::Path { ref path, .. } => Some(RenderTypeId::DefId(path.def_id())),
         clean::DynTrait(ref bounds, _) => {
-            let path = &bounds[0].trait_;
-            Some(RenderTypeId::DefId(path.def_id()))
+            bounds.get(0).map(|b| RenderTypeId::DefId(b.trait_.def_id()))
         }
         clean::Primitive(p) => Some(RenderTypeId::Primitive(p)),
         clean::BorrowedRef { ref type_, .. } | clean::RawPointer(_, ref type_) => {

src/librustdoc/html/static/css/rustdoc.css

@@ -1317,15 +1317,11 @@ a.test-arrow:hover {
 	-webkit-appearance: none;
 	opacity: 1;
 }
+
 #settings-menu, #help-button {
 	margin-left: 4px;
 	display: flex;
 }
-
-#settings-menu > a, #help-button > a, #copy-path {
-	width: 33px;
-}
-
 #settings-menu > a, #help-button > a {
 	display: flex;
 	align-items: center;
@@ -1337,6 +1333,7 @@ a.test-arrow:hover {
 	/* Rare exception to specifying font sizes in rem. Since this is acting
 	   as an icon, it's okay to specify their sizes in pixels. */
 	font-size: 20px;
+	width: 33px;
 }
 
 #settings-menu > a:hover, #settings-menu > a:focus,
@@ -1352,6 +1349,7 @@ a.test-arrow:hover {
 	padding: 0;
 	padding-left: 2px;
 	border: 0;
+	width: 33px;
 }
 #copy-path > img {
 	filter: var(--copy-path-img-filter);