Fix omitted error handling branch in "match" stmt

diff --git a/src/proc.rs b/src/proc.rs
index d805bacc3af4cf82709cd106c4ee564b34550f1b..a867c6e2a5be8ee8704d9efc3ea7fdff1d856a06 100644 (file)
--- a/src/proc.rs
+++ b/src/proc.rs
@@ -51,6 +51,7 @@ impl std::error::Error for Error {
         match self {
             Error::IO(e) => e.source(),
             Error::ParseInt(e) => e.source(),
+            Error::Format(e) => e.source(),
             _ => None,
         }
     }