imp(examples): add error example

Author: omarabid

examples/error.rs

@@ -0,0 +1,33 @@
+// Copyright 2021 Developers of Pyroscope.
+
+// Licensed under the Apache License, Version 2.0 <LICENSE or
+// https://www.apache.org/licenses/LICENSE-2.0>. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate pyroscope;
+
+use pyroscope::{PyroscopeAgent, Result};
+
+fn fibonacci(n: u64) -> u64 {
+    match n {
+        0 | 1 => 1,
+        n => fibonacci(n - 1) + fibonacci(n - 2),
+    }
+}
+
+fn main() -> Result<()> {
+    // This example should fail and return an error.
+    let mut agent = PyroscopeAgent::builder("http://invalid_url", "example.error")
+        .build()?;
+    // Start Agent
+    agent.start()?;
+
+    let _result = fibonacci(47);
+
+    // Stop Agent
+    agent.stop()?;
+
+    drop(agent);
+
+    Ok(())
+}

src/session.rs

@@ -54,8 +54,8 @@ impl SessionManager {
                     }
                     SessionSignal::Kill => {
                         // Kill the session manager
-                        return Ok(());
                         log::trace!("SessionManager - Kill signal received");
+                        return Ok(());
                     }
                 }
             }