update actions to run on ubuntu-18.04 (#7160)

.github/workflows/ci.yml

@@ -17,13 +17,13 @@ jobs:
             kind: test_release
           - os: windows-2019
             kind: test_release
-          - os: ubuntu-16.04
+          - os: ubuntu-18.04
             kind: test_release
-          - os: ubuntu-16.04
+          - os: ubuntu-18.04
             kind: test_debug
-          - os: ubuntu-16.04
+          - os: ubuntu-18.04
             kind: bench
-          - os: ubuntu-16.04
+          - os: ubuntu-18.04
             kind: lint
 
       # Always run master branch builds to completion. This allows the cache to

cli/bench/throughput.rs

@@ -34,7 +34,17 @@ pub(crate) fn cat(deno_exe: &PathBuf, megs: usize) -> Result<Value> {
 pub(crate) fn tcp(deno_exe: &PathBuf, megs: usize) -> Result<Value> {
   let size = megs * MB;
 
-  let shell_cmd = format!("head -c {} /dev/zero | nc {}", size, CLIENT_ADDR);
+  // The GNU flavor of `nc` requires the `-N` flag to shutdown the network socket after EOF on stdin
+  let nc_command = if cfg!(target_os = "linux") {
+    "nc -N"
+  } else {
+    "nc"
+  };
+
+  let shell_cmd = format!(
+    "head -c {} /dev/zero | {} {}",
+    size, nc_command, CLIENT_ADDR
+  );
   println!("{}", shell_cmd);
   let cmd = &["sh", "-c", &shell_cmd];
 

cli/tests/echo_server.ts

@@ -4,7 +4,7 @@ const listener = Deno.listen({ hostname, port: Number(port) });
 console.log("listening on", addr);
 listener.accept().then(
   async (conn): Promise<void> => {
-    await Deno.copy(conn, conn);
+    console.log("recieved bytes:", await Deno.copy(conn, conn));
     conn.close();
     listener.close();
   },