diff --git a/src/lib.rs b/src/lib.rs
index 200423a..13f1b8f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,6 @@
 // rustfmt
 
-#![deny(fat_ptr_transmutes,
-trivial_numeric_casts, unsafe_code,
+#![deny(trivial_numeric_casts, unsafe_code,
 unstable_features, unused_extern_crates,
 unused_import_braces, unused_qualifications,
 variant_size_differences
diff --git a/src/schema.rs b/src/schema.rs
index 248e14e..af3e942 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -139,7 +139,7 @@ impl<R: SymbolRunner> SymbolRunner for NonRepeatingSymbolRunner<R> {
       for resource in resources {
         if !done.contains(&resource) {
           has_to_run = true;
-          done.insert(resource.clone());
+          assert!(done.insert(resource.clone()));
         }
       }
       if !has_to_run {
diff --git a/src/symbols/acme/account_key.rs b/src/symbols/acme/account_key.rs
index 4c94797..32f3fb5 100644
--- a/src/symbols/acme/account_key.rs
+++ b/src/symbols/acme/account_key.rs
@@ -1,4 +1,4 @@
-use std::borrow::{Borrow, Cow};
+use std::borrow::Cow;
 use std::error::Error;
 use std::fmt;
 use std::path::Path;
diff --git a/src/symbols/acme/user.rs b/src/symbols/acme/user.rs
index f7fa7ae..6181907 100644
--- a/src/symbols/acme/user.rs
+++ b/src/symbols/acme/user.rs
@@ -10,7 +10,6 @@ use symbols::{Action, OwnedSymbolAction, SymbolAction, SymbolRunner, Symbol};
 use symbols::acme::AcmeAccountKey;
 use symbols::dir::Dir;
 use symbols::file::File;
-use symbols::hook::Hook;
 use symbols::list::List;
 use symbols::owner::Owner;
 
diff --git a/src/symbols/user.rs b/src/symbols/user.rs
index 15fc7c0..0d4888c 100644
--- a/src/symbols/user.rs
+++ b/src/symbols/user.rs
@@ -1,7 +1,6 @@
 use std::borrow::Cow;
 use std::error::Error;
 use std::fmt;
-use std::io::Error as IoError;
 
 use command_runner::CommandRunner;
 use resources::Resource;
diff --git a/src/symbols/wordpress/plugin.rs b/src/symbols/wordpress/plugin.rs
index 97beb5b..b1c8a51 100644
--- a/src/symbols/wordpress/plugin.rs
+++ b/src/symbols/wordpress/plugin.rs
@@ -2,7 +2,8 @@ use regex::Regex;
 use std::error::Error;
 use std::fmt;
 use std::fs::File as FsFile;
-use std::io::Read;
+use std::io;
+use std::io::{BufRead, BufReader};
 use std::ops::Deref;
 use std::path::{Path, PathBuf};
 
@@ -36,17 +37,29 @@ impl<'a, C, R> Symbol for WordpressPlugin<'a, C, R> where C: Deref<Target=str> +
       return Ok(false);
     }
     let path = self.get_path().join(self.name.to_string() + ".php");
-    let mut file = try!(FsFile::open(path));
-    let mut file_content = String::new();
-    try!(file.read_to_string(&mut file_content));
     let mut version = String::new();
     let mut plugin_uri = String::new();
-    let regex = try!(Regex::new("(?m)^(Plugin URI|Version): (.+)$"));
-    for matches in regex.captures_iter(&file_content) {
-      if &matches[1] == "Plugin URI" {
-        plugin_uri = matches[2].to_string();
-      } else {
-        version = matches[2].to_string();
+    match FsFile::open(path) {
+      Err(e) => {
+        // Check if file exists
+        return if e.kind() == io::ErrorKind::NotFound {
+          Ok(false)
+        } else {
+          Err(Box::new(e))
+        };
+      },
+      Ok(file) => {
+        let mut reader = BufReader::new(file);
+        let regex = Regex::new("(?m)^(Plugin URI|Version): (.+)$")?;
+        for content in reader.lines() {
+          for matches in regex.captures_iter(&(content?)) {
+            if &matches[1] == "Plugin URI" {
+              plugin_uri = matches[2].to_string();
+            } else {
+              version = matches[2].to_string();
+            }
+          }
+        }
       }
     }
     let upstream = try!(self.command_runner.get_output("curl", &["--form", &format!(r###"plugins={{"plugins":{{"{0}/{0}.php":{{"Version":"{1}", "PluginURI":"{2}"}}}}}}"###, self.name, version, plugin_uri), "https://api.wordpress.org/plugins/update-check/1.1/"]));
diff --git a/src/symbols/wordpress/translation.rs b/src/symbols/wordpress/translation.rs
index 930c450..0fb7c01 100644
--- a/src/symbols/wordpress/translation.rs
+++ b/src/symbols/wordpress/translation.rs
@@ -4,7 +4,7 @@ use std::error::Error;
 use std::fmt;
 use std::fs::File as FsFile;
 use std::io;
-use std::io::Read;
+use std::io::{BufRead, BufReader};
 use std::path::Path;
 
 use command_runner::CommandRunner;
@@ -52,20 +52,24 @@ impl<'a, C, D, R> Symbol for WordpressTranslation<'a, C, D, R> where C: AsRef<st
     let mut newest = String::new();
     let match_date = Regex::new("(?m)^\"PO-Revision-Date: (.+)\\+0000\\\\n\"$").unwrap();
     for (_, target) in self.get_pairs() {
-      let file = FsFile::open(target.clone());
-      // Check if file exists
-      if let Err(e) = file {
-        return if e.kind() == io::ErrorKind::NotFound {
-          Ok(false)
-        } else {
-          Err(Box::new(e))
-        };
-      }
-      if target.ends_with(".po") {
-        let mut content = String::new();
-        try!(file.unwrap().read_to_string(&mut content));
-        let file_date = &match_date.captures(&content).unwrap()[1];
-        newest = max(newest, file_date.to_string());
+      match FsFile::open(target.clone()) {
+        Err(e) => {
+          // Check if file exists
+          return if e.kind() == io::ErrorKind::NotFound {
+            Ok(false)
+          } else {
+            Err(Box::new(e))
+          };
+        },
+        Ok(mut file) => if target.ends_with(".po") {
+          let mut reader = BufReader::new(file);
+          for content in reader.lines() {
+            if let Some(match_result) = match_date.captures(&try!(content)) {
+              newest = max(newest, match_result[1].to_string());
+              break;
+            }
+          }
+        }
       }
     }
     let upstream = try!(self.command_runner.get_output("curl", &[&format!("https://api.wordpress.org/core/version-check/1.7/?version={}&locale={}", self.version, self.locale)]));