Auto merge of #73779 - Manishearth:rollup-lwqd9jm, r=Manishearth

Rollup of 12 pull requests

Successful merges:

 - #72771 (Warn if linking to a private item)
 - #72937 (Fortanix SGX target libunwind build process changes)
 - #73485 (Perform obligation deduplication to avoid buggy `ExistentialMismatch`)
 - #73529 (Add liballoc impl SpecFromElem for i8)
 - #73579 (add missing doc links)
 - #73627 (Shortcuts for min/max on double-ended BTreeMap/BTreeSet iterators)
 - #73691 (Bootstrap: detect Windows based on sys.platform)
 - #73694 (Document the Self keyword)
 - #73718 (Document the super keyword)
 - #73728 (Document some invariants correctly/more)
 - #73738 (Remove irrelevant comment)
 - #73765 (Remove blank line)

Failed merges:

r? @ghost

src/test/ui/issues/issue-59326.rs

@@ -0,0 +1,26 @@
+// check-pass
+trait Service {
+    type S;
+}
+
+trait Framing {
+    type F;
+}
+
+impl Framing for () {
+    type F = ();
+}
+
+trait HttpService<F: Framing>: Service<S = F::F> {}
+
+type BoxService = Box<dyn HttpService<(), S = ()>>;
+
+fn build_server<F: FnOnce() -> BoxService>(_: F) {}
+
+fn make_server<F: Framing>() -> Box<dyn HttpService<F, S = F::F>> {
+    unimplemented!()
+}
+
+fn main() {
+    build_server(|| make_server())
+}