From 97fde8cc1b05ec3b37317ed8b80ef395f70ff321 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Thu, 4 Aug 2016 14:09:06 +0200
Subject: [PATCH] Replace unwrap() with map()

---
 libimagerror/src/trace.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/libimagerror/src/trace.rs b/libimagerror/src/trace.rs
index 35b1f1f8..3cb4e78b 100644
--- a/libimagerror/src/trace.rs
+++ b/libimagerror/src/trace.rs
@@ -62,10 +62,12 @@ pub fn trace_error_dbg(e: &Error) {
 /// processed.
 fn print_trace_maxdepth(idx: u64, e: &Error, max: u64) -> Option<&Error> {
     if e.cause().is_some() && idx > 0 {
-        match print_trace_maxdepth(idx - 1, e.cause().unwrap(), max) {
-            None    => write!(stderr(), "\n").ok(),
-            Some(_) => write!(stderr(), " -- caused:\n").ok(),
-        };
+        e.cause().map(|cause| {
+            match print_trace_maxdepth(idx - 1, cause, max) {
+                None    => write!(stderr(), "\n").ok(),
+                Some(_) => write!(stderr(), " -- caused:\n").ok(),
+            };
+        });
     } else {
         write!(stderr(), "\n").ok();
     }