term: Fix editor closing `stderr` stream

Cargo.lock

@@ -2141,6 +2141,7 @@ dependencies = [
  "anyhow",
  "inquire",
  "is-terminal",
+ "libc",
  "once_cell",
  "pretty_assertions",
  "tempfile",

radicle-term/Cargo.toml

@@ -10,6 +10,7 @@ anyhow = { version = "1" }
 anstyle-query = { version = "1.0.0" }
 is-terminal = { version = "0.4.4" }
 inquire = { version = "0.6", default-features = false, features = ["termion", "editor"] }
+libc = { version = "0.2" }
 once_cell = { version = "1.13" }
 termion = { version = "2" }
 unicode-width = { version = "0.1.10", default-features = false }

radicle-term/src/editor.rs

@@ -67,8 +67,17 @@ impl Editor {
                 )
             );
         };
+
+        // We duplicate the stderr file descriptor to pass it to the child process, otherwise, if
+        // we simply pass the `RawFd` of our stderr, `Command` will close our stderr when the
+        // child exits.
+        let stderr = io::stderr().as_raw_fd();
+        let stderr = unsafe { libc::dup(stderr) };
+
         process::Command::new(cmd)
-            .stdout(unsafe { process::Stdio::from_raw_fd(io::stderr().as_raw_fd()) })
+            .stdout(unsafe { process::Stdio::from_raw_fd(stderr) })
+            .stderr(process::Stdio::inherit())
+            .stdin(process::Stdio::inherit())
             .arg(&self.path)
             .spawn()?
             .wait()?;