diff --git a/imag-store/src/create.rs b/imag-store/src/create.rs
index 52c105b0..fc33c9ee 100644
--- a/imag-store/src/create.rs
+++ b/imag-store/src/create.rs
@@ -85,8 +85,8 @@ fn create_from_cli_spec(rt: &Runtime, matches: &ArgMatches, path: &PathBuf) -> R
 fn create_from_source(rt: &Runtime, matches: &ArgMatches, path: &PathBuf) -> Result<()> {
     let content = matches
         .value_of("from-raw")
-        .ok_or_else(|| StoreError::new(StoreErrorKind::NoCommandlineCall, None))
-        .map(|raw_src| string_from_raw_src(raw_src));
+        .ok_or(StoreError::new(StoreErrorKind::NoCommandlineCall, None))
+        .map(string_from_raw_src);
 
     if content.is_err() {
         return content.map(|_| ());
diff --git a/libimagentrytag/src/util.rs b/libimagentrytag/src/util.rs
index 42765193..16b76a1d 100644
--- a/libimagentrytag/src/util.rs
+++ b/libimagentrytag/src/util.rs
@@ -1,5 +1,5 @@
 use regex::Regex;
 
 pub fn is_tag(s: &str) -> bool {
-    Regex::new("^[a-zA-Z]([a-zA-Z0-9_-]*)$").unwrap().captures(&s[..]).is_some()
+    Regex::new("^[a-zA-Z]([a-zA-Z0-9_-]*)$").unwrap().captures(s).is_some()
 }
diff --git a/libimagstore/src/store.rs b/libimagstore/src/store.rs
index b93696eb..ed945a7f 100644
--- a/libimagstore/src/store.rs
+++ b/libimagstore/src/store.rs
@@ -7,7 +7,6 @@ use std::sync::Arc;
 use std::sync::RwLock;
 use std::collections::BTreeMap;
 use std::io::{Seek, SeekFrom};
-use std::io::Write;
 use std::convert::From;
 use std::convert::Into;
 use std::sync::Mutex;
@@ -30,7 +29,6 @@ use lazyfile::LazyFile;
 
 use hook::aspect::Aspect;
 use hook::accessor::{ MutableHookDataAccessor,
-            NonMutableHookDataAccessor,
             StoreIdAccessor};
 use hook::position::HookPosition;
 use hook::Hook;