Ignore muttrc source entries that are not files (Alioth: #312881).

CHANGES

@@ -41,6 +41,7 @@ bash-completion (2.x)
   * Add/improve various autotools completions.
   * Add *.apk to unzip and jar filename completions.
   * Do not load bash_completion in profile.d script if progcomp is not enabled.
+  * Ignore muttrc source entries that are not files (Alioth: #312881).
 
   [ Freddy Vulto ]
   * Added _tilde(), fix ~username completion (Alioth: #312613, Debian: #587095)

completions/mutt

@@ -58,7 +58,7 @@ _muttconffiles()
     while [[ "$1" ]]; do
         newconffiles=( $(sed -n 's|^source[[:space:]]\{1,\}\([^[:space:]]\{1,\}\).*$|\1|p' $(eval echo $1) ) )
         for file in "${newconffiles[@]}"; do
-            [[ ! "$file" || "${sofar/ ${file} / }" != "$sofar" ]] &&
+            [[ ! -f "$file" || "${sofar/ ${file} / }" != "$sofar" ]] &&
                 continue
             sofar="$sofar $file"
             sofar=" $(eval _muttconffiles \"$sofar\" $file) "