Auto merge of #136954 - jhpratt:rollup-koefsot, r=jhpratt

Rollup of 12 pull requests

Successful merges:

 - #134090 (Stabilize target_feature_11)
 - #135025 (Cast allocas to default address space)
 - #135841 (Reject `?Trait` bounds in various places where we unconditionally warned since 1.0)
 - #136217 (Mark condition/carry bit as clobbered in C-SKY inline assembly)
 - #136699 (std: replace the `FromInner` implementation for addresses with private conversion functions)
 - #136806 (Fix cycle when debug-printing opaque types from RPITIT)
 - #136807 (compiler: internally merge `PtxKernel` into `GpuKernel`)
 - #136818 (Implement `read*_exact` for `std:io::repeat`)
 - #136927 (Correctly escape hashtags when running `invalid_rust_codeblocks` lint)
 - #136937 (Update books)
 - #136945 (Add diagnostic item for `std::io::BufRead`)
 - #136947 (Reinstate nnethercote in the review rotation.)

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

1 files changed, 11 insertions, 0 deletions

diff --git a/library/std/src/io/util.rs b/library/std/src/io/util.rs
index b4c4dffc371..424f862090f 100644
--- a/library/std/src/io/util.rs
+++ b/library/std/src/io/util.rs
@@ -188,6 +188,13 @@ impl Read for Repeat {
         Ok(buf.len())
     }
 
+    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
+        for slot in &mut *buf {
+            *slot = self.byte;
+        }
+        Ok(())
+    }
+
     fn read_buf(&mut self, mut buf: BorrowedCursor<'_>) -> io::Result<()> {
         // SAFETY: No uninit bytes are being written
         for slot in unsafe { buf.as_mut() } {
@@ -204,6 +211,10 @@ impl Read for Repeat {
         Ok(())
     }
 
+    fn read_buf_exact(&mut self, buf: BorrowedCursor<'_>) -> io::Result<()> {
+        self.read_buf(buf)
+    }
+
     /// This function is not supported by `io::Repeat`, because there's no end of its data
     fn read_to_end(&mut self, _: &mut Vec<u8>) -> io::Result<usize> {
         Err(io::Error::from(io::ErrorKind::OutOfMemory))