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2 files changed, 3 insertions, 2 deletions

diff --git a/src/ci/citool/src/cpu_usage.rs b/src/ci/citool/src/cpu_usage.rs
index 4c9e37bf6db..fa9a1203f41 100644
--- a/src/ci/citool/src/cpu_usage.rs
+++ b/src/ci/citool/src/cpu_usage.rs
@@ -14,6 +14,8 @@ pub fn load_cpu_usage(path: &Path) -> anyhow::Result<Vec<f64>> {
         if cols.len() == 2 {
             if let Ok(idle) = cols[1].parse::<f64>() {
                 entries.push(100.0 - idle);
+            } else {
+                eprintln!("Warning: cannot parse CPU CSV entry {}", cols[1]);
             }
         }
     }
diff --git a/src/ci/citool/src/utils.rs b/src/ci/citool/src/utils.rs
index eb268ca397c..9cc220987bd 100644
--- a/src/ci/citool/src/utils.rs
+++ b/src/ci/citool/src/utils.rs
@@ -7,6 +7,5 @@ pub fn load_env_var(name: &str) -> anyhow::Result<String> {
 }
 
 pub fn read_to_string<P: AsRef<Path>>(path: P) -> anyhow::Result<String> {
-    let error = format!("Cannot read file {:?}", path.as_ref());
-    std::fs::read_to_string(path).context(error)
+    std::fs::read_to_string(&path).with_context(|| format!("Cannot read file {:?}", path.as_ref()))
 }