diff --git a/libafl/src/executors/forkserver.rs b/libafl/src/executors/forkserver.rs
index e4e1ef187a..666fca4194 100644
--- a/libafl/src/executors/forkserver.rs
+++ b/libafl/src/executors/forkserver.rs
@@ -488,7 +488,7 @@ impl Forkserver {
         let st_read = unsafe { BorrowedFd::borrow_raw(st_read) };
 
         let mut readfds = FdSet::new();
-        readfds.insert(&st_read);
+        readfds.insert(st_read);
         // We'll pass a copied timeout to keep the original timeout intact, because select updates timeout to indicate how much time was left. See select(2)
         let sret = pselect(
             Some(readfds.highest().unwrap().as_raw_fd() + 1),
diff --git a/libafl/src/lib.rs b/libafl/src/lib.rs
index 8bab35bdc9..56de8465e0 100644
--- a/libafl/src/lib.rs
+++ b/libafl/src/lib.rs
@@ -88,13 +88,6 @@ pub extern crate alloc;
 #[allow(unused_imports)]
 #[macro_use]
 extern crate libafl_derive;
-/// Dummy export that will warn with a deprecation note on usage.
-/// Use the `libafl_bolts` crate instead.
-#[deprecated(
-    since = "0.11.0",
-    note = "All LibAFL bolts have moved to the libafl_bolts crate."
-)]
-pub mod bolts {}
 #[cfg(feature = "derive")]
 #[doc(hidden)]
 pub use libafl_derive::*;
diff --git a/libafl_bolts/src/core_affinity.rs b/libafl_bolts/src/core_affinity.rs
index 0614876665..b756854c8f 100644
--- a/libafl_bolts/src/core_affinity.rs
+++ b/libafl_bolts/src/core_affinity.rs
@@ -203,16 +203,6 @@ impl TryFrom<&str> for Cores {
     }
 }
 
-/// Parses core binding args from user input.
-/// Returns a Vec of CPU IDs.
-/// * `./fuzzer --cores 1,2-4,6`: clients run in cores 1,2,3,4,6
-/// * `./fuzzer --cores all`: one client runs on each available core
-#[cfg(feature = "std")]
-#[deprecated(since = "0.8.1", note = "Use Cores::from_cmdline instead")]
-pub fn parse_core_bind_arg(args: &str) -> Result<Vec<usize>, Error> {
-    Ok(Cores::from_cmdline(args)?.ids.iter().map(|x| x.0).collect())
-}
-
 // Linux Section
 
 #[cfg(any(
diff --git a/libafl_bolts/src/lib.rs b/libafl_bolts/src/lib.rs
index d563a6b29d..1a9efaba89 100644
--- a/libafl_bolts/src/lib.rs
+++ b/libafl_bolts/src/lib.rs
@@ -199,17 +199,6 @@ use xxhash_rust::xxh3::xxh3_64;
 )]
 pub struct ClientId(pub u32);
 
-#[cfg(feature = "std")]
-use log::{Metadata, Record};
-
-#[deprecated(
-    since = "0.11.0",
-    note = "The launcher module has moved out of `libafl_bolts` into `libafl::events::launcher`."
-)]
-/// Dummy module informing potential users that the launcher module has moved
-/// out of `libafl_bolts` into `libafl::events::launcher`.
-pub mod launcher {}
-
 use core::{
     array::TryFromSliceError,
     fmt::{self, Display},
@@ -222,6 +211,8 @@ use std::{env::VarError, io};
 
 #[cfg(feature = "libafl_derive")]
 pub use libafl_derive::SerdeAny;
+#[cfg(feature = "std")]
+use log::{Metadata, Record};
 #[cfg(feature = "alloc")]
 use {
     alloc::string::{FromUtf8Error, String},
diff --git a/libafl_bolts/src/os/mod.rs b/libafl_bolts/src/os/mod.rs
index 03b27da8e1..5160bbb50b 100644
--- a/libafl_bolts/src/os/mod.rs
+++ b/libafl_bolts/src/os/mod.rs
@@ -12,7 +12,7 @@ pub mod unix_signals;
 #[cfg(unix)]
 pub use unix_signals::CTRL_C_EXIT;
 
-#[cfg(all(unix, feature = "std"))]
+#[cfg(all(unix, feature = "alloc"))]
 pub mod pipes;
 
 #[cfg(all(unix, feature = "std"))]
diff --git a/libafl_bolts/src/os/pipes.rs b/libafl_bolts/src/os/pipes.rs
index 65ab9ec731..2a48c03501 100644
--- a/libafl_bolts/src/os/pipes.rs
+++ b/libafl_bolts/src/os/pipes.rs
@@ -1,4 +1,7 @@
 //! Unix `pipe` wrapper for `LibAFL`
+use alloc::rc::Rc;
+use core::{borrow::Borrow, cell::RefCell};
+use std::os::fd::{AsFd, AsRawFd, OwnedFd};
 #[cfg(feature = "std")]
 use std::{
     io::{self, ErrorKind, Read, Write},
@@ -6,7 +9,7 @@ use std::{
 };
 
 #[cfg(feature = "std")]
-use nix::unistd::{close, pipe, read, write};
+use nix::unistd::{pipe, read, write};
 
 use crate::Error;
 
@@ -15,9 +18,9 @@ use crate::Error;
 #[derive(Debug, Clone)]
 pub struct Pipe {
     /// The read end of the pipe
-    read_end: Option<RawFd>,
+    read_end: Option<Rc<RefCell<OwnedFd>>>,
     /// The write end of the pipe
-    write_end: Option<RawFd>,
+    write_end: Option<Rc<RefCell<OwnedFd>>>,
 }
 
 #[cfg(feature = "std")]
@@ -26,37 +29,39 @@ impl Pipe {
     pub fn new() -> Result<Self, Error> {
         let (read_end, write_end) = pipe()?;
         Ok(Self {
-            read_end: Some(read_end),
-            write_end: Some(write_end),
+            read_end: Some(Rc::new(RefCell::new(read_end))),
+            write_end: Some(Rc::new(RefCell::new(write_end))),
         })
     }
 
     /// Close the read end of a pipe
     pub fn close_read_end(&mut self) {
-        if let Some(read_end) = self.read_end {
-            let _: Result<(), nix::errno::Errno> = close(read_end);
-            self.read_end = None;
-        }
+        // `OwnedFd` closes on Drop
+        self.read_end = None;
     }
 
     /// Close the write end of a pipe
     pub fn close_write_end(&mut self) {
-        if let Some(write_end) = self.write_end {
-            let _: Result<(), nix::errno::Errno> = close(write_end);
-            self.write_end = None;
-        }
+        // `OwnedFd` closes on Drop
+        self.write_end = None;
     }
 
     /// The read end
     #[must_use]
     pub fn read_end(&self) -> Option<RawFd> {
-        self.read_end
+        self.read_end.as_ref().map(|fd| {
+            let borrowed: &RefCell<OwnedFd> = fd.borrow();
+            borrowed.borrow().as_raw_fd()
+        })
     }
 
     /// The write end
     #[must_use]
     pub fn write_end(&self) -> Option<RawFd> {
-        self.write_end
+        self.write_end.as_ref().map(|fd| {
+            let borrowed: &RefCell<OwnedFd> = fd.borrow();
+            borrowed.borrow().as_raw_fd()
+        })
     }
 }
 
@@ -64,7 +69,7 @@ impl Pipe {
 impl Read for Pipe {
     /// Reads a few bytes
     fn read(&mut self, buf: &mut [u8]) -> Result<usize, io::Error> {
-        match self.read_end {
+        match self.read_end() {
             Some(read_end) => match read(read_end, buf) {
                 Ok(res) => Ok(res),
                 Err(e) => Err(io::Error::from_raw_os_error(e as i32)),
@@ -81,11 +86,14 @@ impl Read for Pipe {
 impl Write for Pipe {
     /// Writes a few bytes
     fn write(&mut self, buf: &[u8]) -> Result<usize, io::Error> {
-        match self.write_end {
-            Some(write_end) => match write(write_end, buf) {
-                Ok(res) => Ok(res),
-                Err(e) => Err(io::Error::from_raw_os_error(e as i32)),
-            },
+        match self.write_end.as_ref() {
+            Some(write_end) => {
+                let borrowed: &RefCell<OwnedFd> = write_end;
+                match write((*borrowed).borrow().as_fd(), buf) {
+                    Ok(res) => Ok(res),
+                    Err(e) => Err(io::Error::from_raw_os_error(e as i32)),
+                }
+            }
             None => Err(io::Error::new(
                 ErrorKind::BrokenPipe,
                 "Write pipe end was already closed",
@@ -97,15 +105,3 @@ impl Write for Pipe {
         Ok(())
     }
 }
-
-#[cfg(feature = "std")]
-impl Drop for Pipe {
-    fn drop(&mut self) {
-        if let Some(read_end) = self.read_end {
-            let _: Result<(), nix::errno::Errno> = close(read_end);
-        }
-        if let Some(write_end) = self.write_end {
-            let _: Result<(), nix::errno::Errno> = close(write_end);
-        }
-    }
-}
diff --git a/libafl_bolts/src/os/unix_shmem_server.rs b/libafl_bolts/src/os/unix_shmem_server.rs
index 38780a27fc..77f0a6208f 100644
--- a/libafl_bolts/src/os/unix_shmem_server.rs
+++ b/libafl_bolts/src/os/unix_shmem_server.rs
@@ -22,6 +22,7 @@ use std::{
     env,
     io::{Read, Write},
     marker::PhantomData,
+    os::fd::{AsFd, BorrowedFd},
     rc::{Rc, Weak},
     sync::{Arc, Condvar, Mutex},
     thread::JoinHandle,
@@ -36,6 +37,7 @@ use std::{
 };
 
 use hashbrown::HashMap;
+use nix::poll::PollTimeout;
 #[cfg(all(feature = "std", unix))]
 use nix::poll::{poll, PollFd, PollFlags};
 use serde::{Deserialize, Serialize};
@@ -672,7 +674,7 @@ where
         };
 
         let mut poll_fds: Vec<PollFd> = vec![PollFd::new(
-            &listener,
+            listener.as_fd(),
             PollFlags::POLLIN | PollFlags::POLLRDNORM | PollFlags::POLLRDBAND,
         )];
 
@@ -681,7 +683,7 @@ where
         cvar.notify_one();
 
         loop {
-            match poll(&mut poll_fds, -1) {
+            match poll(&mut poll_fds, PollTimeout::NONE) {
                 Ok(num_fds) if num_fds > 0 => (),
                 Ok(_) => continue,
                 Err(e) => {
@@ -718,11 +720,10 @@ where
 
                         let pollfd = PollFd::new(
                             // # Safety
-                            // This cast will make `PollFd::new` ignore the lifetime of our stream.
+                            // Going through a raw fd will make `PollFd::new` ignore the lifetime of our stream.
                             // As of nix 0.27, the `PollFd` is safer, in that it checks the lifetime of the given stream.
-                            // We did not develop this server with that new constraint in mind, but it is upheld.
-                            // The `new` function then gets the `raw_fd` from this stream, and operate on that int internally.
-                            unsafe { &*(&stream as *const _) },
+                            // We did not develop this server with that new constraint in mind, but it is upheld by our code.
+                            unsafe { BorrowedFd::borrow_raw(stream.as_raw_fd()) },
                             PollFlags::POLLIN | PollFlags::POLLRDNORM | PollFlags::POLLRDBAND,
                         );
 
diff --git a/libafl_bolts/src/os/unix_signals.rs b/libafl_bolts/src/os/unix_signals.rs
index ed233047f0..58032c0044 100644
--- a/libafl_bolts/src/os/unix_signals.rs
+++ b/libafl_bolts/src/os/unix_signals.rs
@@ -18,7 +18,7 @@ use std::ffi::CString;
 #[cfg(target_arch = "arm")]
 pub use libc::c_ulong;
 #[cfg(feature = "std")]
-use nix::errno::{errno, Errno};
+use nix::errno::Errno;
 
 /// The special exit code when the target exited through ctrl-c
 pub const CTRL_C_EXIT: i32 = 100;
@@ -518,7 +518,7 @@ pub fn ucontext() -> Result<ucontext_t, Error> {
             #[cfg(feature = "std")]
             Err(Error::unknown(format!(
                 "Failed to get ucontext: {:?}",
-                Errno::from_i32(errno())
+                Errno::last()
             )))
         }
     } else {
diff --git a/libafl_bolts/src/tuples.rs b/libafl_bolts/src/tuples.rs
index 31593b781f..282124111e 100644
--- a/libafl_bolts/src/tuples.rs
+++ b/libafl_bolts/src/tuples.rs
@@ -522,6 +522,15 @@ pub struct Handle<T: ?Sized> {
 
 #[cfg(feature = "alloc")]
 impl<T: ?Sized> Handle<T> {
+    /// Create a new [`Handle`] with the given name.
+    #[must_use]
+    pub fn new(name: Cow<'static, str>) -> Self {
+        Self {
+            name,
+            phantom: PhantomData,
+        }
+    }
+
     /// Fetch the name of the referenced instance.
     ///
     /// We explicitly do *not* implement [`Named`], as this could potentially lead to confusion