replace use of try! with ? operator

This fixes the CI build with nightly, as we have deny(warnings)
enabled.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/channel.rs b/src/channel.rs
index 69b535a..3beece6 100644
--- a/src/channel.rs
+++ b/src/channel.rs
@@ -263,7 +263,7 @@ impl Channel {
                 &mut lang,
                 &mut langlen,
             );
-            try!(self.sess.rc(rc));
+            self.sess.rc(rc)?;
             return Ok(ExitSignal {
                 exit_signal: convert(self, sig, siglen),
                 error_message: convert(self, msg, msglen),
@@ -325,7 +325,7 @@ impl Channel {
                 &mut ret,
             )
         };
-        try!(self.sess.rc(rc));
+        self.sess.rc(rc)?;
         Ok(ret as u64)
     }