1 files changed, 4 insertions, 1 deletions
diff --git a/src/git.rs b/src/git.rs
index 0f59c69..35b3dbf 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -19,9 +19,12 @@ pub fn crawl_git_tree<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
         .output()?;
 
     if !output.status.success() {
+        let errstr = String::from_utf8(output.stderr)
+            .unwrap_or_else(|_| String::from("<could not format git error output as UTF8>"));
+
         return Err(io::Error::new(
             io::ErrorKind::Other,
-            "git ls-tree did not run successfully",
+            format!("git ls-tree did not run successfully: {}", errstr),
         ));
     }