4 files changed, 14 insertions, 25 deletions
diff --git a/src/output/aggregators.rs b/src/output/aggregators.rs
index 9934fb3..5d0429c 100644
--- a/src/output/aggregators.rs
+++ b/src/output/aggregators.rs
@@ -8,11 +8,11 @@
 //! an Aggregator must make sure that the data is protected by a mutex or similar.
 use super::{super::LogResult, formats::Format};
 
-use std::{io::Write, sync::Mutex};
+use std::io::Write;
 
 pub trait Aggregator: Sync {
-    fn push_item(&self, item: &LogResult, format: &Format, stream: &mut Write);
-    fn finish(self, format: &Format, stream: &mut Write);
+    fn push_item(&self, item: &LogResult, format: &dyn Format, stream: &mut dyn Write);
+    fn finish(self, format: &dyn Format, stream: &mut dyn Write);
 }
 
 
@@ -22,11 +22,11 @@ pub struct WriteThrough;
 
 
 impl Aggregator for WriteThrough {
-    fn push_item(&self, item: &LogResult, format: &Format, stream: &mut Write) {
+    fn push_item(&self, item: &LogResult, format: &dyn Format, stream: &mut dyn Write) {
         let text = format.format_result(item);
-        println!("Aggregator::push_item {:?}", text);
         stream.write_all(text.as_bytes()).unwrap();
+        stream.flush().unwrap();
     }
 
-    fn finish(self, format: &Format, stream: &mut Write) {}
+    fn finish(self, _: &dyn Format, _: &mut dyn Write) {}
 }
diff --git a/src/output/formats.rs b/src/output/formats.rs
index fe6e982..a5171a8 100644
--- a/src/output/formats.rs
+++ b/src/output/formats.rs
@@ -10,13 +10,6 @@ pub trait Format: Sync + Send {
 }
 
 
-impl<T: Format + ?Sized> Format for Box<T> {
-    fn format_result(&self, item: &LogResult) -> String {
-        (&*self).format_result(item)
-    }
-}
-
-
 /// The human readable, colored format.
 #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
 pub struct HumanReadable;
diff --git a/src/output/mod.rs b/src/output/mod.rs
index dfb3ea8..73af5ab 100644
--- a/src/output/mod.rs
+++ b/src/output/mod.rs
@@ -1,4 +1,3 @@
-use super::errors::RuntimeError;
 use super::{FightOutcome, LogResult, Opt};
 
 use std::io;
@@ -7,20 +6,17 @@ pub mod formats;
 pub mod aggregators;
 pub mod pipeline;
 
-use self::formats::Format;
-use self::aggregators::Aggregator;
 pub use self::pipeline::Pipeline;
 
 
 /// Build an pipeline for the given command line options.
 pub fn build_pipeline(opt: &Opt) -> Pipeline {
     let stream = io::stdout();
+    let aggregator = aggregators::WriteThrough;
 
-    let formatter: Box<dyn Format> = if opt.file_name_only {
-        Box::new(formats::FileOnly)
+    if opt.file_name_only {
+        Pipeline::new(stream, formats::FileOnly, aggregator)
     } else {
-        Box::new(formats::HumanReadable)
-    };
-
-    Pipeline::new(stream, formatter, aggregators::WriteThrough)
+        Pipeline::new(stream, formats::HumanReadable, aggregator)
+    }
 }
diff --git a/src/output/pipeline.rs b/src/output/pipeline.rs
index 9b3c7e5..fb23a6f 100644
--- a/src/output/pipeline.rs
+++ b/src/output/pipeline.rs
@@ -7,12 +7,12 @@ use std::{io::Write, sync::Mutex};
 pub struct Pipeline {
     format: Box<dyn Format>,
     aggregator: Box<dyn Aggregator>,
-    writer: Mutex<Box<dyn Write>>,
+    writer: Mutex<Box<dyn Write + Send>>,
 }
 
 
 impl Pipeline {
-    pub fn new<W: Write + 'static, F: Format + 'static, A: Aggregator + 'static>(writer: W, format: F, aggregator: A) -> Pipeline {
+    pub fn new<W: Write + 'static + Send, F: Format + 'static, A: Aggregator + 'static>(writer: W, format: F, aggregator: A) -> Pipeline {
         Pipeline {
             format: Box::new(format),
             aggregator: Box::new(aggregator),
@@ -22,6 +22,6 @@ impl Pipeline {
 
     pub fn push_item(&self, item: &LogResult) {
         let mut writer = self.writer.lock().unwrap();
-        self.aggregator.push_item(item, &self.format, &mut *writer);
+        self.aggregator.push_item(item, &*self.format, &mut *writer);
     }
 }