Calling file_type may fail

text/0000-io-fs-2.1.md

@@ -510,7 +510,7 @@ impl DirEntry {
     /// On some platforms this may not require reading the metadata of the
     /// underlying file from the filesystem, but on other platforms it may be
     /// required to do so.
-    pub fn file_type(&self) -> FileType;
+    pub fn file_type(&self) -> io::Result<FileType>;
 
     /// Returns the file name for this directory entry.
     pub fn file_name(&self) -> OsString;