From 470733b3238ed692de62e9efbf6952ea8cbe82f3 Mon Sep 17 00:00:00 2001
From: Patrick Thomson <patrickt@github.com>
Date: Wed, 30 Sep 2020 15:49:42 -0400
Subject: [PATCH] Fix crash when nonexistent files were passed to `parse`.

We were unwrapping the result of counting the characters in the vector
returned by collect_files(), which, if that vector is empty, returns
None. The most correct behavior is to halt if a nonexistent filename
was provided or a glob failed.
---
 cli/src/main.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cli/src/main.rs b/cli/src/main.rs
index 620f329f..0b470c74 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -426,6 +426,10 @@ fn collect_paths<'a>(
             }
         }
 
+        if result.is_empty() {
+            Error::err("No files were found at or matched by the provided pathname/glob".to_string())?;
+        }
+
         return Ok(result);
     }