1 files changed, 16 insertions, 0 deletions
diff --git a/test/test_pty.rs b/test/test_pty.rs
index 53e94724..55316ab4 100644
--- a/test/test_pty.rs
+++ b/test/test_pty.rs
@@ -1,5 +1,7 @@
+use std::io::Write;
 use std::path::Path;
 use std::os::unix::prelude::*;
+use tempfile::tempfile;
 
 use nix::fcntl::{O_RDWR, open};
 use nix::pty::*;
@@ -7,6 +9,20 @@ use nix::sys::stat;
 use nix::sys::termios::*;
 use nix::unistd::{write, close};
 
+/// Regression test for Issue #659
+/// This is the correct way to explicitly close a PtyMaster
+#[test]
+fn test_explicit_close() {
+    let mut f = {
+        let m = posix_openpt(O_RDWR).unwrap();
+        close(m.into_raw_fd()).unwrap();
+        tempfile().unwrap()
+    };
+    // This should work.  But if there's been a double close, then it will
+    // return EBADF
+    f.write(b"whatever").unwrap();
+}
+
 /// Test equivalence of `ptsname` and `ptsname_r`
 #[test]
 #[cfg(any(target_os = "android", target_os = "linux"))]