Add command exit code to output if it fails

CHANGELOG.md

@@ -1,5 +1,7 @@
 # unreleased
 
+- Add command exit code to output if it fails, see #342 (@KaindlJulian)
+
 ## Features
 
 ## Changes

src/hyperfine/benchmark.rs

@@ -63,9 +63,15 @@ pub fn time_shell_command(
     if failure_action == CmdFailureAction::RaiseError && !result.status.success() {
         return Err(io::Error::new(
             io::ErrorKind::Other,
-            "Command terminated with non-zero exit code. \
+            format!(
+                "{}. \
                 Use the '-i'/'--ignore-failure' option if you want to ignore this. \
                 Alternatively, use the '--show-output' option to debug what went wrong.",
+                result.status.code().map_or(
+                    "The process has been terminated by a signal".into(),
+                    |c| format!("Command terminated with non-zero exit code: {}", c)
+                )
+            ),
         ));
     }