diff --git a/src/libvm/build.rs b/src/libvm/build.rs
index 22a5461..7b3aab8 100644
--- a/src/libvm/build.rs
+++ b/src/libvm/build.rs
@@ -1,6 +1,6 @@
 use cfgrammar::yacc::YaccKind;
 use lrlex::LexerBuilder;
-use lrpar::{CTParserBuilder};
+use lrpar::CTParserBuilder;
 use rerun_except::rerun_except;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -10,9 +10,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     LexerBuilder::new()
         .rule_ids_map(lex_rule_ids_map)
         .process_file_in_src("obj/syn/lexer.l")?;
-    rerun_except(&[
-        "examples/*.asm",
-        "tests/*.asm",
-    ]).unwrap();
+    rerun_except(&["examples/*.asm", "tests/*.asm"]).unwrap();
     Ok(())
 }
diff --git a/src/libvm/src/addr.rs b/src/libvm/src/addr.rs
index e13ab95..e51da37 100644
--- a/src/libvm/src/addr.rs
+++ b/src/libvm/src/addr.rs
@@ -33,7 +33,7 @@ macro_rules! impl_add_assign {
                 self.0 = self.0 + (rhs as u64);
             }
         }
-    }
+    };
 }
 
 impl_add_assign!(usize);
@@ -53,7 +53,7 @@ macro_rules! impl_cmp {
                 self.0.partial_cmp(&other)
             }
         }
-    }
+    };
 }
 
 impl_cmp!(usize);
@@ -66,7 +66,7 @@ macro_rules! impl_from {
                 Addr(other as u64)
             }
         }
-    }
+    };
 }
 
 impl_from!(usize);
diff --git a/src/libvm/src/error.rs b/src/libvm/src/error.rs
index c55f0a3..4868d33 100644
--- a/src/libvm/src/error.rs
+++ b/src/libvm/src/error.rs
@@ -1,4 +1,4 @@
-use crate::{inst::InstOp, reg::Reg, addr::*,};
+use crate::{addr::*, inst::InstOp, reg::Reg};
 use snafu::Snafu;
 
 #[derive(Snafu, Debug, Clone)]
diff --git a/src/libvm/src/inst.rs b/src/libvm/src/inst.rs
index e03a812..4776a27 100644
--- a/src/libvm/src/inst.rs
+++ b/src/libvm/src/inst.rs
@@ -125,34 +125,28 @@ impl Inst {
     pub fn len(&self) -> usize {
         match self {
             Inst::Add(dest, source)
-                | Inst::Sub(dest, source)
-                | Inst::Mul(dest, source)
-                | Inst::Div(dest, source)
-                | Inst::IDiv(dest, source)
-                | Inst::Mod(dest, source)
-                | Inst::And(dest, source)
-                | Inst::Or(dest, source)
-                | Inst::Xor(dest, source)
-                | Inst::Shl(dest, source)
-                | Inst::Shr(dest, source)
-                | Inst::INeg(dest, source)
-                | Inst::Inv(dest, source)
-                | Inst::Not(dest, source)
-                | Inst::Mov(dest, source) => { 3 + dest.len() + source.len() }
-            Inst::CmpEq(s1, s2)
-                | Inst::CmpLt(s1, s2)
-                | Inst::Int(s1, s2) => { 3 + s1.len() + s2.len() }
-            Inst::Jmp(v)
-                | Inst::Jz(v)
-                | Inst::Jnz(v)
-                | Inst::Call(v)
-                | Inst::Push(v) => { 3 + v.len() }
-            Inst::Pop(v) => { 3 + v.len() }
-            Inst::Ret
-                | Inst::Halt
-                | Inst::Nop
-                | Inst::Dump
-                | Inst::IRet => { 2 }
+            | Inst::Sub(dest, source)
+            | Inst::Mul(dest, source)
+            | Inst::Div(dest, source)
+            | Inst::IDiv(dest, source)
+            | Inst::Mod(dest, source)
+            | Inst::And(dest, source)
+            | Inst::Or(dest, source)
+            | Inst::Xor(dest, source)
+            | Inst::Shl(dest, source)
+            | Inst::Shr(dest, source)
+            | Inst::INeg(dest, source)
+            | Inst::Inv(dest, source)
+            | Inst::Not(dest, source)
+            | Inst::Mov(dest, source) => 3 + dest.len() + source.len(),
+            Inst::CmpEq(s1, s2) | Inst::CmpLt(s1, s2) | Inst::Int(s1, s2) => {
+                3 + s1.len() + s2.len()
+            }
+            Inst::Jmp(v) | Inst::Jz(v) | Inst::Jnz(v) | Inst::Call(v) | Inst::Push(v) => {
+                3 + v.len()
+            }
+            Inst::Pop(v) => 3 + v.len(),
+            Inst::Ret | Inst::Halt | Inst::Nop | Inst::Dump | Inst::IRet => 2,
         }
     }
 }
@@ -176,7 +170,10 @@ impl Source {
     pub fn len(&self) -> usize {
         match self {
             Source::Addr64(_) | Source::Addr32(_) | Source::Addr16(_) | Source::Addr8(_) => 8,
-            Source::RegAddr64(_) | Source::RegAddr32(_) | Source::RegAddr16(_) | Source::RegAddr8(_) => 1,
+            Source::RegAddr64(_)
+            | Source::RegAddr32(_)
+            | Source::RegAddr16(_)
+            | Source::RegAddr8(_) => 1,
             Source::Reg(_) => 1,
             Source::Imm(_) => 8,
         }
diff --git a/src/libvm/src/interrupt.rs b/src/libvm/src/interrupt.rs
index 1f563ba..80fb5a6 100644
--- a/src/libvm/src/interrupt.rs
+++ b/src/libvm/src/interrupt.rs
@@ -26,7 +26,7 @@ pub const IVT_LENGTH: usize = 512;
 pub struct Interrupt(u64);
 
 const ENABLED_MASK: u64 = 0x8000_0000_0000_0000;
-const ADDR_MASK: u64    = 0x07ff_ffff_ffff_ffff;
+const ADDR_MASK: u64 = 0x07ff_ffff_ffff_ffff;
 
 impl Interrupt {
     pub fn enabled(&self) -> bool {
@@ -37,7 +37,7 @@ impl Interrupt {
         let enabled = (enabled as u64) << 63;
         self.0 |= enabled;
     }
-    
+
     pub fn addr(&self) -> Addr {
         Addr((self.0 & ADDR_MASK) << 5)
     }
diff --git a/src/libvm/src/mem.rs b/src/libvm/src/mem.rs
index 335f24c..2ccb8c5 100644
--- a/src/libvm/src/mem.rs
+++ b/src/libvm/src/mem.rs
@@ -8,11 +8,14 @@ pub struct MemCursor<T> {
 }
 
 impl<T> MemCursor<T>
-    where Cursor<T>: ReadBytesExt,
-          T: AsRef<[u8]>
+where
+    Cursor<T>: ReadBytesExt,
+    T: AsRef<[u8]>,
 {
     pub fn new(mem: T) -> Self {
-        MemCursor { cursor: Cursor::new(mem) }
+        MemCursor {
+            cursor: Cursor::new(mem),
+        }
     }
 
     pub fn position(&self) -> u64 {
@@ -32,7 +35,7 @@ impl<T> MemCursor<T>
         let end = start + count;
         self.check_addr(end as u64 - 1)?;
         self.cursor.set_position(end as u64);
-        Ok(&self.cursor.get_ref().as_ref()[start .. end])
+        Ok(&self.cursor.get_ref().as_ref()[start..end])
     }
 
     pub fn next_u8_unchecked(&mut self) -> u8 {
@@ -61,7 +64,7 @@ impl<T> MemCursor<T>
         self.check_addr(self.position() + 3)
             .map(|_| self.next_u32_unchecked())
     }
-    
+
     pub fn next_u64_unchecked(&mut self) -> u64 {
         self.cursor.read_u64::<LE>().unwrap()
     }
@@ -220,7 +223,8 @@ impl<T> MemCursor<T>
 }
 
 impl<T> MemCursor<T>
-    where T: AsRef<[u8]>
+where
+    T: AsRef<[u8]>,
 {
     fn check_addr(&self, addr: u64) -> Result<()> {
         if addr >= (self.cursor.get_ref().as_ref().len() as u64) {
@@ -232,8 +236,9 @@ impl<T> MemCursor<T>
 }
 
 impl<T> MemCursor<T>
-    where Cursor<T>: WriteBytesExt,
-          T: AsRef<[u8]>
+where
+    Cursor<T>: WriteBytesExt,
+    T: AsRef<[u8]>,
 {
     pub fn write_u8_unchecked(&mut self, value: u8) {
         self.cursor.write_u8(value).unwrap();
diff --git a/src/libvm/src/obj/assemble.rs b/src/libvm/src/obj/assemble.rs
index 05359ed..d15f108 100644
--- a/src/libvm/src/obj/assemble.rs
+++ b/src/libvm/src/obj/assemble.rs
@@ -1,7 +1,7 @@
 pub mod error;
-pub mod session;
 mod includes;
 mod names;
+pub mod session;
 
 use self::{error::*, session::AsmSession};
 use crate::{
@@ -11,7 +11,7 @@ use crate::{
     obj::{
         obj::{self, Object},
         syn::ast::*,
-    }
+    },
 };
 use byteorder::{WriteBytesExt, LE};
 use std::{collections::HashMap, path::Path};
@@ -48,7 +48,7 @@ impl Asm for Directive {
         match self {
             Directive::Data(section) => Ok(Some(obj::Section::Data(section.assemble(asm)?))),
             Directive::Meta(section) => section.assemble(asm).map(Some),
-            Directive::Include(_) => { Ok(None) }
+            Directive::Include(_) => Ok(None),
         }
     }
 }
@@ -81,7 +81,10 @@ impl Asm for DataSection {
         let mut contents = Vec::with_capacity(content_len as usize);
         for (pos, line) in self.lines(start) {
             let expected_len = pos - (start as usize);
-            assert!(expected_len >= contents.len(), "next line size would cause section to shrink");
+            assert!(
+                expected_len >= contents.len(),
+                "next line size would cause section to shrink"
+            );
             // resize contents if necessary, this pads out aligned values
             contents.resize(expected_len, 0);
             contents.extend(line.assemble(session)?);
@@ -93,11 +96,7 @@ impl Asm for DataSection {
             "in section {}",
             self.name
         );
-        assert_eq!(
-            session.pos - start, content_len,
-            "in section {}",
-            self.name
-        );
+        assert_eq!(session.pos - start, content_len, "in section {}", self.name);
 
         session.name_stack.pop();
         Ok(obj::DataSection {
@@ -122,8 +121,15 @@ impl Asm for MetaSection {
             }
             let value = match &line.value {
                 Value::Int(i) => *i,
-                Value::Name(s) => session.lookup_name(s.as_str())
-                    .ok_or_else(|| AsmError::UnknownName { name: s.to_string() })?.addr.0,
+                Value::Name(s) => {
+                    session
+                        .lookup_name(s.as_str())
+                        .ok_or_else(|| AsmError::UnknownName {
+                            name: s.to_string(),
+                        })?
+                        .addr
+                        .0
+                }
                 Value::Reg(_) | Value::Here | Value::Addr(_, _) => {
                     return Err(AsmError::IllegalMetaValue {
                         name: line.name.to_string(),
@@ -218,10 +224,7 @@ impl Asm for Inst {
                 let dest_encoding = dest.source_encoding() << 4;
                 bytes.write_u8(dest_encoding).unwrap();
                 bytes.extend(dest.assemble(session)?);
-                assert_eq!(
-                    len,
-                    bytes.len(),
-                );
+                assert_eq!(len, bytes.len(),);
                 Ok(bytes)
             }
             Inst::Int(v1, v2) => self.map_source_source(session, inst::INT, v1, v2),
@@ -235,47 +238,56 @@ impl Asm for Inst {
 }
 
 impl Inst {
-    fn map_dest_source(&self, session: &mut AsmSession, op: inst::InstOp, dest: &Value, source: &Value) -> Result<Vec<u8>> {
+    fn map_dest_source(
+        &self,
+        session: &mut AsmSession,
+        op: inst::InstOp,
+        dest: &Value,
+        source: &Value,
+    ) -> Result<Vec<u8>> {
         let len = self.len();
         let mut bytes = Vec::with_capacity(len);
         bytes.write_u16::<LE>(op).unwrap();
-        let dest_encoding =
-            dest.dest_encoding()
-                .ok_or_else(|| AsmError::IllegalDestValue {
-                    value: dest.clone(),
-                })?;
+        let dest_encoding = dest
+            .dest_encoding()
+            .ok_or_else(|| AsmError::IllegalDestValue {
+                value: dest.clone(),
+            })?;
         let source_encoding = source.source_encoding();
         bytes
             .write_u8((dest_encoding << 4) | source_encoding)
             .unwrap();
         bytes.extend(dest.assemble(session)?);
         bytes.extend(source.assemble(session)?);
-        assert_eq!(
-            len,
-            bytes.len(),
-        );
+        assert_eq!(len, bytes.len(),);
         Ok(bytes)
     }
 
-    fn map_source_source(&self, session: &mut AsmSession, op: inst::InstOp, s1: &Value, s2: &Value) -> Result<Vec<u8>> {
+    fn map_source_source(
+        &self,
+        session: &mut AsmSession,
+        op: inst::InstOp,
+        s1: &Value,
+        s2: &Value,
+    ) -> Result<Vec<u8>> {
         let len = self.len();
         let mut bytes = Vec::with_capacity(len);
         bytes.write_u16::<LE>(op).unwrap();
         let s1_encoding = s1.source_encoding();
         let s2_encoding = s2.source_encoding();
-        bytes
-            .write_u8((s1_encoding << 4) | s2_encoding)
-            .unwrap();
+        bytes.write_u8((s1_encoding << 4) | s2_encoding).unwrap();
         bytes.extend(s1.assemble(session)?);
         bytes.extend(s2.assemble(session)?);
-        assert_eq!(
-            len,
-            bytes.len(),
-        );
+        assert_eq!(len, bytes.len(),);
         Ok(bytes)
     }
 
-    fn map_source(&self, session: &mut AsmSession, op: inst::InstOp, source: &Value) -> Result<Vec<u8>> {
+    fn map_source(
+        &self,
+        session: &mut AsmSession,
+        op: inst::InstOp,
+        source: &Value,
+    ) -> Result<Vec<u8>> {
         let len = self.len();
         let mut bytes = Vec::with_capacity(len);
         bytes.write_u16::<LE>(op).unwrap();
@@ -290,10 +302,7 @@ impl Inst {
         let len = self.len();
         let mut bytes = Vec::with_capacity(len);
         bytes.write_u16::<LE>(op).unwrap();
-        assert_eq!(
-            len,
-            bytes.len(),
-        );
+        assert_eq!(len, bytes.len(),);
         Ok(bytes)
     }
 }
@@ -306,8 +315,12 @@ impl Asm for Value {
             Value::Int(i) => Ok(i.to_le_bytes().to_vec()),
             Value::Reg(r) => Ok(vec![*r]),
             Value::Name(name) => {
-                let value = session.lookup_name(name.as_str())
-                    .ok_or_else(|| AsmError::UnknownName { name: name.to_string() })?;
+                let value =
+                    session
+                        .lookup_name(name.as_str())
+                        .ok_or_else(|| AsmError::UnknownName {
+                            name: name.to_string(),
+                        })?;
                 Ok(value.addr.0.to_le_bytes().to_vec())
             }
             Value::Here => Ok(session.pos.to_le_bytes().to_vec()),
@@ -331,7 +344,7 @@ mod test {
     fn test_inst_len() {
         let mut session = AsmSession::default();
         //asm.names
-            //.push(vec![("test".to_string(), Addr(0u64))].into_iter().collect());
+        //.push(vec![("test".to_string(), Addr(0u64))].into_iter().collect());
 
         macro_rules! assert_len {
             ($inst:expr) => {{
diff --git a/src/libvm/src/obj/assemble/error.rs b/src/libvm/src/obj/assemble/error.rs
index 0ddc932..1791814 100644
--- a/src/libvm/src/obj/assemble/error.rs
+++ b/src/libvm/src/obj/assemble/error.rs
@@ -112,4 +112,3 @@ impl From<LexParseError> for SyntaxError {
 }
 
 pub type Result<T, E = AsmError> = std::result::Result<T, E>;
-
diff --git a/src/libvm/src/obj/assemble/names.rs b/src/libvm/src/obj/assemble/names.rs
index 062ce86..c465f5d 100644
--- a/src/libvm/src/obj/assemble/names.rs
+++ b/src/libvm/src/obj/assemble/names.rs
@@ -1,14 +1,14 @@
 use crate::{
     addr::Addr,
     obj::{
-        assemble::{
-            session::AsmSession,
-            error::*,
-        },
-        syn::ast::{DataSection, DataLine, Directive},
+        assemble::{error::*, session::AsmSession},
+        syn::ast::{DataLine, DataSection, Directive},
     },
 };
-use std::{collections::{HashMap, HashSet}, rc::Rc};
+use std::{
+    collections::{HashMap, HashSet},
+    rc::Rc,
+};
 
 // TODO(asm) make custom Names type that has "merge" that will catch errors with duplicate names
 pub type Names = HashMap<String, Name>;
@@ -53,12 +53,15 @@ pub fn get_section_names(section: &DataSection) -> Result<Names> {
                 return Err(AsmError::DuplicateLabel { name: name.clone() });
             }
             let export = exports.remove(name);
-            
-            names.insert(name.clone(), Name {
-                name: name.clone(),
-                addr: Addr(pos as u64),
-                export,
-            });
+
+            names.insert(
+                name.clone(),
+                Name {
+                    name: name.clone(),
+                    addr: Addr(pos as u64),
+                    export,
+                },
+            );
         }
     }
 
@@ -66,7 +69,9 @@ pub fn get_section_names(section: &DataSection) -> Result<Names> {
     if exports.is_empty() {
         Ok(names)
     } else {
-        Err(AsmError::UnknownExport { name: exports.iter().next().unwrap().to_string() })
+        Err(AsmError::UnknownExport {
+            name: exports.iter().next().unwrap().to_string(),
+        })
     }
 }
 
@@ -93,12 +98,16 @@ pub fn get_exports(session: &mut AsmSession) -> Result<Names> {
     for name_map in all_exports.iter() {
         let names_set: HashSet<_> = name_map.keys().collect();
         if let Some(dupe) = exports.intersection(&names_set).next() {
-            return Err(AsmError::DuplicateExport { name: dupe.to_string() });
+            return Err(AsmError::DuplicateExport {
+                name: dupe.to_string(),
+            });
         }
         exports.extend(names_set);
     }
 
     // NOTE: this can probably be done with a fancy combinator chain
-    Ok(all_exports.into_iter()
-        .fold(Names::new(), |mut acc, val| { acc.extend(val); acc }))
+    Ok(all_exports.into_iter().fold(Names::new(), |mut acc, val| {
+        acc.extend(val);
+        acc
+    }))
 }
diff --git a/src/libvm/src/obj/assemble/session.rs b/src/libvm/src/obj/assemble/session.rs
index dd1c7c0..a267568 100644
--- a/src/libvm/src/obj/assemble/session.rs
+++ b/src/libvm/src/obj/assemble/session.rs
@@ -1,14 +1,12 @@
-use crate::{
-    obj::{
-        assemble::{
-            Asm,
-            includes::GetIncludes,
-            names::{self, Name, Names},
-            error::*,
-        },
-        obj::Object,
-        syn::ast::Ast,
+use crate::obj::{
+    assemble::{
+        error::*,
+        includes::GetIncludes,
+        names::{self, Name, Names},
+        Asm,
     },
+    obj::Object,
+    syn::ast::Ast,
 };
 use std::{
     collections::BTreeMap,
@@ -19,19 +17,17 @@ use std::{
 /// A shared session for the assembler.
 #[derive(Debug, Default)]
 pub struct AsmSession {
-    pub (in super) includes: Rc<BTreeMap<PathBuf, Ast>>,
-    pub (in super) include_search_paths: Vec<PathBuf>,
-    pub (in super) include_stack: Vec<PathBuf>,
-    pub (in super) name_stack: Vec<Names>,
-    pub (in super) pos: u64,
+    pub(super) includes: Rc<BTreeMap<PathBuf, Ast>>,
+    pub(super) include_search_paths: Vec<PathBuf>,
+    pub(super) include_stack: Vec<PathBuf>,
+    pub(super) name_stack: Vec<Names>,
+    pub(super) pos: u64,
 }
 
 impl AsmSession {
     pub fn assemble(&mut self) -> Result<Object> {
         let includes = Rc::clone(&self.includes);
-        let sections: Vec<_> = includes.iter()
-            .flat_map(|(_, ast)| ast)
-            .collect();
+        let sections: Vec<_> = includes.iter().flat_map(|(_, ast)| ast).collect();
         sections.assemble(self)
     }
 
@@ -46,19 +42,21 @@ impl AsmSession {
         Ok(())
     }
 
-    pub (in super) fn current_include_path(&self) -> Option<&Path> {
+    pub(super) fn current_include_path(&self) -> Option<&Path> {
         self.include_stack.last().map(PathBuf::as_path)
     }
 
-    pub (in super) fn resolve_include_path(&self, path: impl AsRef<Path>) -> Option<PathBuf> {
+    pub(super) fn resolve_include_path(&self, path: impl AsRef<Path>) -> Option<PathBuf> {
         let path = path.as_ref();
         self.current_include_path()
             .and_then(|last_path| last_path.parent())
             .map(|last_dir| last_dir.join(path))
-            .or_else(|| self.include_search_paths
-                .iter()
-                .filter_map(|include| include.join(path).canonicalize().ok())
-                .next())
+            .or_else(|| {
+                self.include_search_paths
+                    .iter()
+                    .filter_map(|include| include.join(path).canonicalize().ok())
+                    .next()
+            })
     }
 
     pub fn lookup_name(&self, name: &str) -> Option<&Name> {
diff --git a/src/libvm/src/obj/disassemble.rs b/src/libvm/src/obj/disassemble.rs
index 6f7a3a0..dc8ae71 100644
--- a/src/libvm/src/obj/disassemble.rs
+++ b/src/libvm/src/obj/disassemble.rs
@@ -1,8 +1,9 @@
 use crate::{mem::MemCursor, obj::obj::*};
-use prettytable::{Table, row, cell};
-use std::io::{self, Write as Write};
+use prettytable::{cell, row, Table};
+use std::io::{self, Write};
 
-const SEP: &str = "================================================================================";
+const SEP: &str =
+    "================================================================================";
 
 pub trait Disasm {
     fn disasm(&self, writer: &mut dyn Write) -> io::Result<()>;
@@ -61,8 +62,8 @@ impl Disasm for DataSection {
             if let Ok(inst) = cursor.next_inst() {
                 let start = cursor_pos as usize;
                 let end = start + inst.len();
-                let data = &self.contents.as_slice()[start .. end];
-                table.add_row(row! [
+                let data = &self.contents.as_slice()[start..end];
+                table.add_row(row![
                     format!("{:016x} <{}+{:x}>", pos, self.name, cursor_pos),
                     bytes_hex(data),
                     format!("{:?}", inst),
diff --git a/src/libvm/src/obj/error.rs b/src/libvm/src/obj/error.rs
index ed45922..229bcbc 100644
--- a/src/libvm/src/obj/error.rs
+++ b/src/libvm/src/obj/error.rs
@@ -42,4 +42,3 @@ into_parse_error! {
 }
 
 pub type Result<T, E = ParseError> = std::result::Result<T, E>;
-
diff --git a/src/libvm/src/obj/obj.rs b/src/libvm/src/obj/obj.rs
index 2cad6e3..c380f25 100644
--- a/src/libvm/src/obj/obj.rs
+++ b/src/libvm/src/obj/obj.rs
@@ -114,8 +114,8 @@ pub enum Section {
 impl Section {
     pub fn len(&self) -> usize {
         match self {
-            Section::Data(s) => { 1 + 8 + s.len() },
-            Section::Meta(s) => { 1 + 8 + s.len() },
+            Section::Data(s) => 1 + 8 + s.len(),
+            Section::Meta(s) => 1 + 8 + s.len(),
         }
     }
 
@@ -129,7 +129,7 @@ impl Section {
             Section::Meta(s) => {
                 cursor.write_u8(SectionKind::Meta.into()).unwrap();
                 s.to_bytes()
-            },
+            }
         };
         cursor.write_u64::<LE>(bytes.len() as u64).unwrap();
         cursor.write(&bytes).unwrap();
@@ -181,7 +181,7 @@ impl DataSection {
         let name_len = cursor.read_u16::<LE>()? as usize;
         let name_start = cursor.position() as usize;
         let name_end = name_start + name_len;
-        let name_bytes = &bytes[name_start .. name_end];
+        let name_bytes = &bytes[name_start..name_end];
         let name_string = String::from_utf8(name_bytes.to_vec())?;
         cursor.set_position(name_end as u64);
 
@@ -205,7 +205,9 @@ pub struct MetaSection {
 
 impl MetaSection {
     pub fn len(&self) -> usize {
-        8 + self.entries.iter()
+        8 + self
+            .entries
+            .iter()
             .map(|(k, _)| 8 + k.as_bytes().len() + 8)
             .sum::<usize>()
     }
@@ -254,11 +256,11 @@ mod test {
                     name: "data".to_string(),
                     start: 0,
                     len: 16,
-                    contents: vec!(0u8; 16),
+                    contents: vec![0u8; 16],
                 }),
                 Section::Meta(MetaSection {
                     entries: Default::default(),
-                })
+                }),
             ],
         };
 
diff --git a/src/libvm/src/obj/syn/ast.rs b/src/libvm/src/obj/syn/ast.rs
index e979a8c..160714b 100644
--- a/src/libvm/src/obj/syn/ast.rs
+++ b/src/libvm/src/obj/syn/ast.rs
@@ -1,8 +1,4 @@
-use crate::{
-    interrupt::Interrupt,
-    inst,
-    reg::Reg,
-};
+use crate::{inst, interrupt::Interrupt, reg::Reg};
 
 pub type Ast = Vec<Directive>;
 
@@ -182,7 +178,7 @@ impl Value {
             Value::Addr(v, _) => v.len(),
         }
     }
-    
+
     pub fn dest_encoding(&self) -> Option<u8> {
         match self {
             Value::Int(_) | Value::Name(_) | Value::Here => None,
@@ -291,34 +287,30 @@ impl Inst {
     pub fn len(&self) -> usize {
         match self {
             Inst::Add(v1, v2)
-                | Inst::Sub(v1, v2)
-                | Inst::Mul(v1, v2)
-                | Inst::Div(v1, v2)
-                | Inst::IDiv(v1, v2)
-                | Inst::Mod(v1, v2)
-                | Inst::And(v1, v2)
-                | Inst::Or(v1, v2)
-                | Inst::Xor(v1, v2)
-                | Inst::Shl(v1, v2)
-                | Inst::Shr(v1, v2)
-                | Inst::INeg(v1, v2)
-                | Inst::Inv(v1, v2)
-                | Inst::Not(v1, v2)
-                | Inst::CmpEq(v1, v2)
-                | Inst::CmpLt(v1, v2)
-                | Inst::Int(v1, v2)
-                | Inst::Mov(v1, v2) => { 3 + v1.len() + v2.len() }
+            | Inst::Sub(v1, v2)
+            | Inst::Mul(v1, v2)
+            | Inst::Div(v1, v2)
+            | Inst::IDiv(v1, v2)
+            | Inst::Mod(v1, v2)
+            | Inst::And(v1, v2)
+            | Inst::Or(v1, v2)
+            | Inst::Xor(v1, v2)
+            | Inst::Shl(v1, v2)
+            | Inst::Shr(v1, v2)
+            | Inst::INeg(v1, v2)
+            | Inst::Inv(v1, v2)
+            | Inst::Not(v1, v2)
+            | Inst::CmpEq(v1, v2)
+            | Inst::CmpLt(v1, v2)
+            | Inst::Int(v1, v2)
+            | Inst::Mov(v1, v2) => 3 + v1.len() + v2.len(),
             Inst::Jmp(v)
-                | Inst::Jz(v)
-                | Inst::Jnz(v)
-                | Inst::Call(v)
-                | Inst::Push(v)
-                | Inst::Pop(v) => { 3 + v.len() }
-            Inst::Ret
-                | Inst::IRet
-                | Inst::Halt
-                | Inst::Nop
-                | Inst::Dump => { 2 }
+            | Inst::Jz(v)
+            | Inst::Jnz(v)
+            | Inst::Call(v)
+            | Inst::Push(v)
+            | Inst::Pop(v) => 3 + v.len(),
+            Inst::Ret | Inst::IRet | Inst::Halt | Inst::Nop | Inst::Dump => 2,
         }
     }
 }
diff --git a/src/libvm/src/state.rs b/src/libvm/src/state.rs
index 24161bf..f2cfb6c 100644
--- a/src/libvm/src/state.rs
+++ b/src/libvm/src/state.rs
@@ -146,21 +146,25 @@ impl State {
     pub fn ivt(&self) -> Result<&[Interrupt]> {
         let ivt_addr = self.get_reg_unchecked(IVT);
         if ivt_addr % 64 != 0 {
-            panic!("illegal IVT address {:#x}; must be divisible by 64", ivt_addr);
+            panic!(
+                "illegal IVT address {:#x}; must be divisible by 64",
+                ivt_addr
+            );
         }
 
         let start = ivt_addr as usize;
         let end = start + (IVT_LENGTH * mem::size_of::<Interrupt>());
 
         if end > self.mem.len() {
-            return Err(VmError::MemOutOfBounds { addr: Addr(ivt_addr) });
+            return Err(VmError::MemOutOfBounds {
+                addr: Addr(ivt_addr),
+            });
         }
 
         // This is safe because we check the bounds above
         let slice_ptr = (&self.mem[start..]).as_ptr();
-        let slice = unsafe { 
-            std::slice::from_raw_parts(slice_ptr as *const Interrupt, IVT_LENGTH)
-        };
+        let slice =
+            unsafe { std::slice::from_raw_parts(slice_ptr as *const Interrupt, IVT_LENGTH) };
 
         Ok(slice)
     }
@@ -383,10 +387,12 @@ impl State {
     fn push(&mut self, source: Source) -> Result<()> {
         let value = self.load_source(source)?;
         let mut stack_addr = self.sp();
-        
+
         // create a destination based on the size of the source
         let dest = match source {
-            Source::Addr64(_) | Source::RegAddr64(_) | Source::Reg(_) | Source::Imm(_) => Dest::Addr64(Addr(stack_addr)),
+            Source::Addr64(_) | Source::RegAddr64(_) | Source::Reg(_) | Source::Imm(_) => {
+                Dest::Addr64(Addr(stack_addr))
+            }
             Source::Addr32(_) | Source::RegAddr32(_) => Dest::Addr32(Addr(stack_addr)),
             Source::Addr16(_) | Source::RegAddr16(_) => Dest::Addr16(Addr(stack_addr)),
             Source::Addr8(_) | Source::RegAddr8(_) => Dest::Addr8(Addr(stack_addr)),
diff --git a/src/main.rs b/src/main.rs
index c628bd8..ae213dc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,21 +2,26 @@ mod common;
 
 extern crate libvm as vm;
 
-use structopt::StructOpt;
 use snafu::Snafu;
-use std::{fs, io::{stdout, Write}, path::{Path, PathBuf}, process};
+use std::{
+    fs,
+    io::{stdout, Write},
+    path::{Path, PathBuf},
+    process,
+};
+use structopt::StructOpt;
 
 const DEFAULT_MAX_MEM: usize = 64 * 1024 * 1024;
 
 #[derive(Snafu, Debug, Clone, PartialEq)]
 enum ArgParseError<'a> {
     #[snafu(display("invalid specified size: {} (sizes may end in G, M, or K)", text))]
-    InvalidSize { text: &'a str }
+    InvalidSize { text: &'a str },
 }
 
 fn from_bytes_size<'a>(mut text: &'a str) -> std::result::Result<usize, ArgParseError<'a>> {
     if text.is_empty() {
-        return Err(ArgParseError::InvalidSize { text })
+        return Err(ArgParseError::InvalidSize { text });
     }
     let multiplier = match text.chars().last().unwrap() {
         'k' | 'K' => 1024,
@@ -26,9 +31,11 @@ fn from_bytes_size<'a>(mut text: &'a str) -> std::result::Result<usize, ArgParse
     };
     // trim the last character
     if multiplier != 1 {
-        text = &text[0 .. text.len() - 1];
+        text = &text[0..text.len() - 1];
     }
-    let value = text.parse::<usize>().map_err(|_| ArgParseError::InvalidSize { text })?;
+    let value = text
+        .parse::<usize>()
+        .map_err(|_| ArgParseError::InvalidSize { text })?;
     Ok(value * multiplier)
 }
 
@@ -56,7 +63,6 @@ fn test_bytes_size() {
 struct Options {
     // maybe some other options:
     // * debug
-
     /// The input file to work with.
     ///
     /// By default, the file will be executed. If -c is passed, it will not run and only compile.
@@ -82,7 +88,6 @@ struct Options {
     /// Only compile the input file to an object.
     #[structopt(short = "c", long)]
     compile_only: bool,
-
 }
 
 type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
@@ -107,8 +112,8 @@ fn get_writer(path: impl AsRef<Path>) -> Result<Box<dyn Write>> {
 
 fn main() -> Result<()> {
     use vm::{
-        state::State,
         obj::{assemble, disassemble::Disasm},
+        state::State,
     };
 
     let opt = Options::from_args();
@@ -125,7 +130,9 @@ fn main() -> Result<()> {
         writer.write(&bytes)?;
         Ok(())
     } else if opt.disassemble {
-        let outfile = opt.out.as_ref()
+        let outfile = opt
+            .out
+            .as_ref()
             .map(|p| p.as_path())
             .unwrap_or_else(|| Path::new("-"));
         let mut writer = get_writer(&outfile)?;
@@ -138,4 +145,3 @@ fn main() -> Result<()> {
         process::exit((status & 0xffff_ffff) as i32);
     }
 }
-