Auto merge of rust-lang#122312 - matthiaskrgr:rollup-0p8y7gg, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#122275 (disable OOM test in Miri)
 - rust-lang#122276 (io::Read trait: make it more clear when we are adressing implementations vs callers)
 - rust-lang#122277 (BorrowedCursor docs clarification)
 - rust-lang#122286 (use Instance::expect_resolve() instead of unwraping Instance::resolve())
 - rust-lang#122290 (MIR printing: print the path of uneval'd const)
 - rust-lang#122293 (diagnostics: Do not suggest using `#[unix_sigpipe]` without a value)
 - rust-lang#122297 (bootstrap: document what the triples in 'Build' mean)
 - rust-lang#122302 (docs: Correct ptr/ref verbiage in SliceIndex docs.)
 - rust-lang#122304 (fix metadata for dyn-star in new solver)

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

Author: bors

core/src/io/borrowed_buf.rs

@@ -139,9 +139,11 @@ impl<'data> BorrowedBuf<'data> {
     }
 }
 
-/// A writeable view of the unfilled portion of a [`BorrowedBuf`](BorrowedBuf).
+/// A writeable view of the unfilled portion of a [`BorrowedBuf`].
+///
+/// The unfilled portion consists of an initialized and an uninitialized part; see [`BorrowedBuf`]
+/// for details.
 ///
-/// Provides access to the initialized and uninitialized parts of the underlying `BorrowedBuf`.
 /// Data can be written directly to the cursor by using [`append`](BorrowedCursor::append) or
 /// indirectly by getting a slice of part or all of the cursor and writing into the slice. In the
 /// indirect case, the caller must call [`advance`](BorrowedCursor::advance) after writing to inform

core/src/slice/index.rs

@@ -180,19 +180,19 @@ pub unsafe trait SliceIndex<T: ?Sized>: private_slice_index::Sealed {
     #[unstable(feature = "slice_index_methods", issue = "none")]
     fn get_mut(self, slice: &mut T) -> Option<&mut Self::Output>;
 
-    /// Returns a shared reference to the output at this location, without
+    /// Returns a pointer to the output at this location, without
     /// performing any bounds checking.
     /// Calling this method with an out-of-bounds index or a dangling `slice` pointer
-    /// is *[undefined behavior]* even if the resulting reference is not used.
+    /// is *[undefined behavior]* even if the resulting pointer is not used.
     ///
     /// [undefined behavior]: https://doc.rust-lang.org/reference/behavior-considered-undefined.html
     #[unstable(feature = "slice_index_methods", issue = "none")]
     unsafe fn get_unchecked(self, slice: *const T) -> *const Self::Output;
 
-    /// Returns a mutable reference to the output at this location, without
+    /// Returns a mutable pointer to the output at this location, without
     /// performing any bounds checking.
     /// Calling this method with an out-of-bounds index or a dangling `slice` pointer
-    /// is *[undefined behavior]* even if the resulting reference is not used.
+    /// is *[undefined behavior]* even if the resulting pointer is not used.
     ///
     /// [undefined behavior]: https://doc.rust-lang.org/reference/behavior-considered-undefined.html
     #[unstable(feature = "slice_index_methods", issue = "none")]

std/src/io/mod.rs

@@ -692,10 +692,9 @@ pub trait Read {
     /// Callers have to ensure that no unchecked out-of-bounds accesses are possible even if
     /// `n > buf.len()`.
     ///
-    /// No guarantees are provided about the contents of `buf` when this
-    /// function is called, so implementations cannot rely on any property of the
-    /// contents of `buf` being true. It is recommended that *implementations*
-    /// only write data to `buf` instead of reading its contents.
+    /// *Implementations* of this method can make no assumptions about the contents of `buf` when
+    /// this function is called. It is recommended that implementations only write data to `buf`
+    /// instead of reading its contents.
     ///
     /// Correspondingly, however, *callers* of this method in unsafe code must not assume
     /// any guarantees about how the implementation uses `buf`. The trait is safe to implement,
@@ -901,12 +900,10 @@ pub trait Read {
     /// This function reads as many bytes as necessary to completely fill the
     /// specified buffer `buf`.
     ///
-    /// No guarantees are provided about the contents of `buf` when this
-    /// function is called, so implementations cannot rely on any property of the
-    /// contents of `buf` being true. It is recommended that implementations
-    /// only write data to `buf` instead of reading its contents. The
-    /// documentation on [`read`] has a more detailed explanation on this
-    /// subject.
+    /// *Implementations* of this method can make no assumptions about the contents of `buf` when
+    /// this function is called. It is recommended that implementations only write data to `buf`
+    /// instead of reading its contents. The documentation on [`read`] has a more detailed
+    /// explanation of this subject.
     ///
     /// # Errors
     ///

std/src/io/tests.rs

@@ -694,6 +694,8 @@ fn read_buf_full_read() {
 }
 
 #[test]
+// Miri does not support signalling OOM
+#[cfg_attr(miri, ignore)]
 // 64-bit only to be sure the allocator will fail fast on an impossible to satsify size
 #[cfg(target_pointer_width = "64")]
 fn try_oom_error() {