From b24b5b02f3a4a2429920b0aae0fd7debdacc2dcd Mon Sep 17 00:00:00 2001
From: Andrew Walbran <qwandor@google.com>
Date: Mon, 3 Apr 2023 15:31:27 +0100
Subject: [PATCH] Include input filename in error message.

---
 exerciser/src/main.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/exerciser/src/main.rs b/exerciser/src/main.rs
index 81785919..1bdb29fd 100644
--- a/exerciser/src/main.rs
+++ b/exerciser/src/main.rs
@@ -42,9 +42,9 @@ fn main() -> anyhow::Result<()> {
         format!("Failed to create output directory {:?}", output_directory)
     })?;
 
-    let input_directory = input_filename
-        .parent()
-        .with_context(|| "Input file has no parent directory.")?;
+    let input_directory = input_filename.parent().with_context(|| {
+        format!("Input file {:?} has no parent directory.", input_filename)
+    })?;
     let input_contents = read_to_string(input_filename)
         .with_context(|| format!("Failed to open {:?}", input_filename))?;