diff --git a/rls-analysis/src/lib.rs b/rls-analysis/src/lib.rs
index 84663140d66..2bd47328e17 100644
--- a/rls-analysis/src/lib.rs
+++ b/rls-analysis/src/lib.rs
@@ -21,7 +21,7 @@ mod util;
 use analysis::Analysis;
 pub use analysis::{Def, Ref};
 pub use loader::{AnalysisLoader, CargoAnalysisLoader, SearchDirectory, Target};
-pub use raw::{name_space_for_def_kind, read_analysis_from_files, CrateId, DefKind};
+pub use raw::{name_space_for_def_kind, read_analysis_from_files, Crate, CrateId, DefKind};
 pub use symbol_query::SymbolQuery;
 
 use std::collections::HashMap;
diff --git a/rls-analysis/src/lowering.rs b/rls-analysis/src/lowering.rs
index d69254d5c5b..405c21ad4e0 100644
--- a/rls-analysis/src/lowering.rs
+++ b/rls-analysis/src/lowering.rs
@@ -2,14 +2,11 @@
 //! in-memory representation.
 
 use crate::analysis::{Def, Glob, PerCrateAnalysis, Ref};
-use data;
 use crate::loader::AnalysisLoader;
 use crate::raw::{self, CrateId, DefKind, RelationKind};
 use crate::util;
 use crate::{AResult, AnalysisHost, Id, Span, NULL};
 
-use span;
-
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};
 use std::iter::Extend;
diff --git a/rls-analysis/src/raw.rs b/rls-analysis/src/raw.rs
index 77996fa3907..3b712242f14 100644
--- a/rls-analysis/src/raw.rs
+++ b/rls-analysis/src/raw.rs
@@ -4,8 +4,6 @@ pub use data::{
     CratePreludeData, Def, DefKind, GlobalCrateId as CrateId, Import, Ref, Relation, RelationKind,
     SigElement, Signature, SpanData,
 };
-use crate::listings::{DirectoryListing, ListingKind};
-use crate::{AnalysisLoader, Blacklist};
 
 use std::collections::HashMap;
 use std::fs::File;
@@ -13,6 +11,9 @@ use std::io::{self, Read};
 use std::path::{Path, PathBuf};
 use std::time::{Instant, SystemTime};
 
+use crate::listings::{DirectoryListing, ListingKind};
+use crate::{AnalysisLoader, Blacklist};
+
 #[derive(Debug)]
 pub struct Crate {
     pub id: CrateId,
diff --git a/rls-vfs/src/lib.rs b/rls-vfs/src/lib.rs
index 8b697ee6ec5..bd73c780f01 100644
--- a/rls-vfs/src/lib.rs
+++ b/rls-vfs/src/lib.rs
@@ -170,6 +170,12 @@ impl fmt::Display for Error {
     }
 }
 
+impl<U> Default for Vfs<U> {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl<U> Vfs<U> {
     /// Creates a new, empty VFS.
     pub fn new() -> Vfs<U> {
@@ -558,7 +564,7 @@ impl<T: FileLoader, U> VfsInternal<T, U> {
         let mut files = self.files.lock().unwrap();
         match files.get_mut(path) {
             Some(ref mut file) => {
-                if let None = file.user_data {
+                if file.user_data.is_none() {
                     let text = match file.kind {
                         FileKind::Text(ref f) => Some(&f.text as &str),
                         FileKind::Binary(_) => None,
@@ -587,7 +593,7 @@ fn coalesce_changes<'a>(changes: &'a [Change]) -> HashMap<&'a Path, Vec<&'a Chan
     // Note that for any given file, we preserve the order of the changes.
     let mut result = HashMap::new();
     for c in changes {
-        result.entry(&*c.file()).or_insert(vec![]).push(c);
+        result.entry(&*c.file()).or_insert_with(Vec::new).push(c);
     }
     result
 }
@@ -735,7 +741,7 @@ impl TextFile {
                     new_text.push_str(&self.text[range.1 as usize..]);
                     new_text
                 }
-                Change::AddFile { file: _, ref text } => text.to_owned(),
+                Change::AddFile { ref text, .. } => text.to_owned(),
             };
 
             self.text = new_text;
@@ -823,7 +829,7 @@ fn byte_in_str(s: &str, c: span::Column<span::ZeroIndexed>) -> Result<usize, Err
         }
     }
 
-    return Err(Error::InternalError("Out of bounds access in `byte_in_str`"));
+    Err(Error::InternalError("Out of bounds access in `byte_in_str`"))
 }
 
 /// Return a UTF-8 byte offset in `s` for a given UTF-16 code unit offset.
@@ -842,7 +848,7 @@ fn byte_in_str_utf16(s: &str, c: span::Column<span::ZeroIndexed>) -> Result<usiz
         utf16_offset += chr.len_utf16();
     }
 
-    return Err(Error::InternalError("UTF-16 code unit offset is not at `str` char boundary"));
+    Err(Error::InternalError("UTF-16 code unit offset is not at `str` char boundary"))
 }
 
 trait FileLoader {
@@ -864,7 +870,7 @@ impl FileLoader for RealFileLoader {
             }
         };
         let mut buf = vec![];
-        if let Err(_) = file.read_to_end(&mut buf) {
+        if file.read_to_end(&mut buf).is_err() {
             return Err(Error::Io(
                 Some(file_name.to_owned()),
                 Some(format!("Could not read file: {}", file_name.display())),