Auto merge of #111153 - Dylan-DPC:rollup-0pq0hh3, r=Dylan-DPC

Rollup of 11 pull requests

Successful merges:

 - #107978 (Correctly convert an NT path to a Win32 path in `read_link`)
 - #110436 (Support loading version information from xz tarballs)
 - #110791 (Implement negative bounds for internal testing purposes)
 - #110874 (Adjust obligation cause code for `find_and_report_unsatisfied_index_impl`)
 - #110908 (resolve: One more attempt to simplify `module_children`)
 - #110943 (interpret: fail more gracefully on uninit unsized locals)
 - #111062 (Don't bail out early when checking invalid `repr` attr)
 - #111069 (remove pointless `FIXME` in `bootstrap::download`)
 - #111086 (Remove `MemEncoder`)
 - #111097 (Avoid ICEing miri on layout query cycles)
 - #111112 (Add some triagebot notifications for nnethercote.)

Failed merges:

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

Author: bors

tests/fail/layout_cycle.rs

@@ -0,0 +1,28 @@
+//@error-pattern: a cycle occurred during layout computation
+//~^ ERROR: cycle detected when computing layout of
+
+use std::mem;
+
+pub struct S<T: Tr> {
+    pub f: <T as Tr>::I,
+}
+
+pub trait Tr {
+    type I: Tr;
+}
+
+impl<T: Tr> Tr for S<T> {
+    type I = S<S<T>>;
+}
+
+impl Tr for () {
+    type I = ();
+}
+
+fn foo<T: Tr>() -> usize {
+    mem::size_of::<S<T>>()
+}
+
+fn main() {
+    println!("{}", foo::<S<()>>());
+}

tests/fail/layout_cycle.stderr

@@ -0,0 +1,28 @@
+error[E0391]: cycle detected when computing layout of `S<S<()>>`
+   |
+   = note: ...which requires computing layout of `<S<()> as Tr>::I`...
+   = note: ...which again requires computing layout of `S<S<()>>`, completing the cycle
+
+error: post-monomorphization error: a cycle occurred during layout computation
+  --> RUSTLIB/core/src/mem/mod.rs:LL:CC
+   |
+LL |     intrinsics::size_of::<T>()
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ a cycle occurred during layout computation
+   |
+   = note: inside `std::mem::size_of::<S<S<()>>>` at RUSTLIB/core/src/mem/mod.rs:LL:CC
+note: inside `foo::<S<()>>`
+  --> $DIR/layout_cycle.rs:LL:CC
+   |
+LL |     mem::size_of::<S<T>>()
+   |     ^^^^^^^^^^^^^^^^^^^^^^
+note: inside `main`
+  --> $DIR/layout_cycle.rs:LL:CC
+   |
+LL |     println!("{}", foo::<S<()>>());
+   |                    ^^^^^^^^^^^^^^
+
+note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0391`.