From 42d9672e3f2110c58d1af9de542a08ba0ab6f358 Mon Sep 17 00:00:00 2001
From: Kamen Mladenov <kamen@syndamia.com>
Date: Wed, 30 Apr 2025 13:41:49 +0300
Subject: fix(zkvms io): More detailed errors on metrics output failure

---
 zkvms_guest_io/src/main.rs | 4 ++--
 zkvms_host_io/src/lib.rs   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/zkvms_guest_io/src/main.rs b/zkvms_guest_io/src/main.rs
index ab20a32..23b7aef 100644
--- a/zkvms_guest_io/src/main.rs
+++ b/zkvms_guest_io/src/main.rs
@@ -131,12 +131,12 @@ fn main() {
         {
             Ok(file) => file,
             Err(e) => {
-                panic!("Failed to open file: {}", e);
+                panic!("Failed to open metrics output file \"{path}\": {e}");
             }
         };
 
         if let Err(e) = writeln!(outfile, "{}", runs.dump()) {
-            panic!("Failed to write output: {}", e);
+            panic!("Failed to write to metrics output file \"{path}\": {e}");
         }
     } else {
         println!("{}", runs.dump());
diff --git a/zkvms_host_io/src/lib.rs b/zkvms_host_io/src/lib.rs
index bf7ebc4..ee66bae 100644
--- a/zkvms_host_io/src/lib.rs
+++ b/zkvms_host_io/src/lib.rs
@@ -206,12 +206,12 @@ pub fn emit_benchmark_results(run_info: RunWith, starts: Vec<Instant>, ends: Vec
         {
             Ok(file) => file,
             Err(e) => {
-                panic!("Failed to open file: {}", e);
+                panic!("Failed to open metrics output file \"{path}\": {e}");
             }
         };
 
         if let Err(e) = writeln!(outfile, "{}", run.dump()) {
-            panic!("Failed to write output: {}", e);
+            panic!("Failed to write to metrics output file \"{path}\": {e}");
         }
     } else {
         println!("{}", run.dump());
-- 
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