detach() after Thread::spawn() is no longer needed

See rust-lang/rust#20615

Author: alkor

codegen/main.rs

@@ -12,7 +12,7 @@ fn main() {
     Thread::spawn(move || {
         let output_dir = Path::new(os::getenv("OUT_DIR").unwrap());
         read_method::generate(output_dir).unwrap();
-    }).detach();
+    });
 
     let output_dir = Path::new(os::getenv("OUT_DIR").unwrap());
     status::generate(output_dir).unwrap();

src/http/server/mod.rs

@@ -39,7 +39,7 @@ pub trait Server: Send + Clone {
         let (perf_sender, perf_receiver) = channel();
         Thread::spawn(move || {
             perf_dumper(perf_receiver);
-        }).detach();
+        });
         loop {
             let time_start = precise_time_ns();
             let stream = match acceptor.accept() {
@@ -118,7 +118,7 @@ pub trait Server: Send + Clone {
                     }
                     first = false;
                 }
-            }).detach();
+            });
         }
     }