From ff645ceff9d8b954ac4269ac6456956acd6b7f31 Mon Sep 17 00:00:00 2001
From: Mark Rousskov <mark.simulacrum@gmail.com>
Date: Wed, 18 Dec 2019 19:38:01 -0500
Subject: [PATCH] Print out error message and file when detecting that rust
 parser panicked

---
 src/formatting.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/formatting.rs b/src/formatting.rs
index eb4f37d1ab2..e4ac5b31f80 100644
--- a/src/formatting.rs
+++ b/src/formatting.rs
@@ -76,7 +76,10 @@ fn format_project<T: FormatHandler>(
         Err(e) => {
             let forbid_verbose = input_is_stdin || e != ParserError::ParsePanicError;
             should_emit_verbose(forbid_verbose, config, || {
-                eprintln!("The Rust parser panicked");
+                eprintln!(
+                    "The Rust parser panicked while parsing input: {:?}: {:?}",
+                    main_file, e
+                );
             });
             report.add_parsing_error();
             return Ok(report);