From 3a3691f1878bf3727585c982526c9db5a79c746c Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sun, 10 Feb 2019 12:58:08 +0100
Subject: [PATCH] when there are multiple filenames, print what got interpreted
 as 2nd filename

---
 src/librustc_driver/lib.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs
index a95ce810ffaeb..fe02dd27072f7 100644
--- a/src/librustc_driver/lib.rs
+++ b/src/librustc_driver/lib.rs
@@ -839,7 +839,15 @@ impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
                 early_error(sopts.error_format, "no input filename given");
             }
             1 => panic!("make_input should have provided valid inputs"),
-            _ => early_error(sopts.error_format, "multiple input filenames provided"),
+            _ =>
+                early_error(
+                    sopts.error_format,
+                    &format!(
+                        "multiple input filenames provided (first two filenames are `{}` and `{}`)",
+                        matches.free[0],
+                        matches.free[1],
+                    ),
+                )
         }
     }