diff --git a/src/context/memory.rs b/src/context/memory.rs
index 7c24add14f..ecc8ec5f5e 100644
--- a/src/context/memory.rs
+++ b/src/context/memory.rs
@@ -87,11 +87,10 @@ pub struct AddrSpaceWrapper {
 }
 impl AddrSpaceWrapper {
     pub fn new() -> Result<Arc<Self>> {
-        Arc::try_new(Self {
+        Ok(Arc::new(Self {
             inner: RwLock::new(AddrSpace::new()?),
             tlb_ack: AtomicU32::new(0),
-        })
-        .map_err(|_| Error::new(ENOMEM))
+        }))
     }
     pub fn acquire_read(&self) -> RwLockReadGuard<'_, AddrSpace> {
         let my_percpu = PercpuBlock::current();
diff --git a/src/context/mod.rs b/src/context/mod.rs
index 9d3242cde1..2990d50e08 100644
--- a/src/context/mod.rs
+++ b/src/context/mod.rs
@@ -4,7 +4,6 @@
 
 use alloc::{collections::BTreeSet, sync::Arc};
 use core::num::NonZeroUsize;
-use syscall::ENOMEM;
 
 use crate::{
     context::memory::AddrSpaceWrapper,
@@ -15,7 +14,7 @@ use crate::{
         ArcRwLockWriteGuard, CleanLockToken, LockToken, RwLock, RwLockReadGuard, RwLockWriteGuard,
         L0, L1, L2,
     },
-    syscall::error::{Error, Result},
+    syscall::error::Result,
 };
 
 use self::context::Kstack;
@@ -159,8 +158,7 @@ pub fn spawn(
 ) -> Result<Arc<ContextLock>> {
     let stack = Kstack::new()?;
 
-    let context_lock = Arc::try_new(ContextLock::new(Context::new(owner_proc_id)?))
-        .map_err(|_| Error::new(ENOMEM))?;
+    let context_lock = Arc::new(ContextLock::new(Context::new(owner_proc_id)?));
 
     contexts_mut(token.token()).insert(ContextRef(Arc::clone(&context_lock)));
 
diff --git a/src/main.rs b/src/main.rs
index 54c3b066a3..c2e4adcb30 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,7 +40,6 @@
 // Ensure that all must_use results are used
 #![deny(unused_must_use)]
 #![warn(static_mut_refs)] // FIXME deny once all occurences are fixed
-#![feature(allocator_api)]
 #![feature(if_let_guard)]
 #![feature(int_roundings)]
 #![feature(iter_next_chunk)]
diff --git a/src/ptrace.rs b/src/ptrace.rs
index 187b2b374f..755448ed27 100644
--- a/src/ptrace.rs
+++ b/src/ptrace.rs
@@ -87,8 +87,8 @@ impl Session {
             .as_ref()?
             .upgrade()
     }
-    pub fn try_new(file_id: usize) -> Result<Arc<Session>> {
-        Arc::try_new(Session {
+    pub fn new(file_id: usize) -> Arc<Session> {
+        Arc::new(Session {
             data: Mutex::new(SessionData {
                 breakpoint: None,
                 events: VecDeque::new(),
@@ -97,7 +97,6 @@ impl Session {
             tracee: WaitCondition::new(),
             tracer: WaitCondition::new(),
         })
-        .map_err(|_| Error::new(ENOMEM))
     }
 }
 
diff --git a/src/scheme/proc.rs b/src/scheme/proc.rs
index 21ba16fe09..a9076e53a0 100644
--- a/src/scheme/proc.rs
+++ b/src/scheme/proc.rs
@@ -729,8 +729,7 @@ impl KernelScheme for ProcScheme {
                     }
                     let filetable = filetable.upgrade().ok_or(Error::new(EOWNERDEAD))?;
 
-                    let new_filetable = Arc::try_new(spin::RwLock::new(filetable.read().clone()))
-                        .map_err(|_| Error::new(ENOMEM))?;
+                    let new_filetable = Arc::new(spin::RwLock::new(filetable.read().clone()));
 
                     handle(
                         Handle {