diff --git a/kernel/src/holeybytes/ecah.rs b/kernel/src/holeybytes/ecah.rs
index d0202cf..8571363 100644
--- a/kernel/src/holeybytes/ecah.rs
+++ b/kernel/src/holeybytes/ecah.rs
@@ -129,7 +129,7 @@ pub fn handler(vm: &mut Vm) {
                             };
                             msg_vec.remove(0);
 
-                            let addr = ((msg_vec[0] as u16) << 8) + msg_vec[1] as u16;
+                            let addr = ((msg_vec[0] as u16) << 8) | msg_vec[1] as u16;
                             msg_vec.remove(0);
                             msg_vec.remove(0);
                             let value = unsafe {
@@ -155,7 +155,7 @@ pub fn handler(vm: &mut Vm) {
                                 }
                             };
                             msg_vec.remove(0);
-                            let addr = ((msg_vec[0] as u16) << 8) + msg_vec[1] as u16;
+                            let addr = ((msg_vec[0] as u16) << 8) | msg_vec[1] as u16;
                             msg_vec.remove(0);
                             msg_vec.remove(0);
                             trace!("Setting address {}", addr);
@@ -164,15 +164,14 @@ pub fn handler(vm: &mut Vm) {
                                     1 => x86_out(addr, msg_vec[0]),
                                     2 => x86_out_16(
                                         addr,
-                                        core::mem::transmute::<[u8; 2], u16>(
-                                            msg_vec[0..2].try_into().unwrap(),
-                                        ),
+                                        ((msg_vec[0] as u16) << 8) | msg_vec[1] as u16,
                                     ),
                                     4 => x86_out_32(
                                         addr,
-                                        core::mem::transmute::<[u8; 4], u32>(
-                                            msg_vec[0..4].try_into().unwrap(),
-                                        ),
+                                        ((msg_vec[0] as u32) << 24)
+                                            | ((msg_vec[1] as u32) << 16)
+                                            | ((msg_vec[2] as u32) << 8)
+                                            | (msg_vec[3] as u32),
                                     ),
                                     _ => panic!("How?"),
                                 }
diff --git a/repbuild/src/main.rs b/repbuild/src/main.rs
index af09c6d..8eb4835 100644
--- a/repbuild/src/main.rs
+++ b/repbuild/src/main.rs
@@ -22,10 +22,13 @@ fn main() -> Result<(), Error> {
     match args.next().as_deref() {
         Some("build" | "b") => {
             let mut release = false;
+            let mut debuginfo = false;
             let mut target = Target::X86_64;
             for arg in args {
                 if arg == "-r" || arg == "--release" {
                     release = true;
+                } else if arg == "-d" || arg == "--debuginfo" {
+                    debuginfo = true;
                 } else if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
                 } else if arg == "arm64" || arg == "aarch64" || arg == "aarch64-virt" {
@@ -35,14 +38,17 @@ fn main() -> Result<(), Error> {
                 }
             }
 
-            build(release, target).change_context(Error::Build)
+            build(release, target, debuginfo).change_context(Error::Build)
         }
         Some("run" | "r") => {
             let mut release = false;
+            let mut debuginfo = false;
             let mut target = Target::X86_64;
             for arg in args {
                 if arg == "-r" || arg == "--release" {
                     release = true;
+                } else if arg == "-d" || arg == "--debuginfo" {
+                    debuginfo = true;
                 } else if arg == "rv64" || arg == "riscv64" || arg == "riscv64-virt" {
                     target = Target::Riscv64Virt;
                 } else if arg == "arm64" || arg == "aarch64" || arg == "aarch64-virt" {
@@ -52,7 +58,7 @@ fn main() -> Result<(), Error> {
                 }
             }
 
-            build(release, target)?;
+            build(release, target, debuginfo)?;
             run(release, target)
         }
         Some("help" | "h") => {
@@ -270,7 +276,7 @@ fn copy_file_to_img(fpath: &str, fs: &FileSystem<File>) {
     .expect("Copy failed");
 }
 
-fn build(release: bool, target: Target) -> Result<(), Error> {
+fn build(release: bool, target: Target, debuginfo: bool) -> Result<(), Error> {
     let fs = get_fs().change_context(Error::Io)?;
     let mut com = Command::new("cargo");
     com.current_dir("kernel");
@@ -278,6 +284,9 @@ fn build(release: bool, target: Target) -> Result<(), Error> {
     if release {
         com.arg("-r");
     }
+    if debuginfo {
+        com.env("RUSTFLAGS", "-Cdebug-assertions=true");
+    }
 
     if target == Target::Riscv64Virt {
         com.args(["--target", "targets/riscv64-virt-ableos.json"]);