index/run_command: Add stdout to error message

Author: arlosi

cargo-registry-index/lib.rs

@@ -524,7 +524,12 @@ impl Repository {
         let output = command.output()?;
         if !output.status.success() {
             let stderr = String::from_utf8_lossy(&output.stderr);
-            return Err(anyhow!("Running git command failed with: {}", stderr));
+            let stdout = String::from_utf8_lossy(&output.stdout);
+            return Err(anyhow!(
+                "Running git command failed with: {}{}",
+                stderr,
+                stdout
+            ));
         }
 
         Ok(())