Auto merge of #54051 - kennytm:rollup, r=kennytm

Rollup of 10 pull requests

Successful merges:

 - #53315 (use `NonZeroU32` in `newtype_index!`macro, change syntax)
 - #53932 ([NLL] Remove base_place)
 - #53942 (Rewrite `precompute_borrows_out_of_scope` for fewer hash table lookups.)
 - #53973 (Have rust-lldb look for the rust-enabled lldb)
 - #53981 (Implement initializer() for FileDesc)
 - #53987 (rustbuild: allow configuring llvm version suffix)
 - #53993 (rustc_resolve: don't record uniform_paths canaries as reexports.)
 - #54007 (crates that provide a `panic_handler` are exempt from the `unused_extern_crates` lint)
 - #54040 (update books for next release)
 - #54050 (Update `petgraph` dependency to 0.4.13 to fix build with nightly)

1 files changed, 6 insertions, 1 deletions

diff --git a/src/libstd/sys/unix/fd.rs b/src/libstd/sys/unix/fd.rs
index 12e14734ff5..db2ea6b660a 100644
--- a/src/libstd/sys/unix/fd.rs
+++ b/src/libstd/sys/unix/fd.rs
@@ -11,7 +11,7 @@
 #![unstable(reason = "not public", issue = "0", feature = "fd")]
 
 use cmp;
-use io::{self, Read};
+use io::{self, Read, Initializer};
 use libc::{self, c_int, c_void, ssize_t};
 use mem;
 use sync::atomic::{AtomicBool, Ordering};
@@ -270,6 +270,11 @@ impl<'a> Read for &'a FileDesc {
     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
         (**self).read(buf)
     }
+
+    #[inline]
+    unsafe fn initializer(&self) -> Initializer {
+        Initializer::nop()
+    }
 }
 
 impl AsInner<c_int> for FileDesc {