Fix build with nightly feature

Author: ids1024

src/directory_entry/isofile.rs

@@ -90,11 +90,6 @@ pub struct ISOFileReader<T: ISO9660Reader> {
 }
 
 impl<T: ISO9660Reader> Read for ISOFileReader<T> {
-    #[cfg(feature = "nightly")]
-    unsafe fn initializer(&self) -> std::io::Initializer {
-        std::io::Initializer::nop()
-    }
-
     fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> {
         let mut seek = self.seek;
         while !buf.is_empty() && seek < self.size {
@@ -113,6 +108,8 @@ impl<T: ISO9660Reader> Read for ISOFileReader<T> {
         self.seek = seek;
         Ok(bytes)
     }
+
+    // TODO implement `read_buf` on nightly
 }
 
 impl<T: ISO9660Reader> Seek for ISOFileReader<T> {

src/fileref.rs

@@ -23,7 +23,7 @@ impl<T: Read + Seek> ISO9660Reader for T {
 impl<T: Read + Seek> ISO9660Reader for T {
     default fn read_at(&mut self, buf: &mut [u8], lba: u64) -> Result<usize> {
         self.seek(SeekFrom::Start(lba * 2048))?;
-        self.read(buf)?
+        self.read(buf)
     }
 }
 
@@ -33,7 +33,7 @@ impl ISO9660Reader for File {
         #[cfg(unix)]
         {
             use std::os::unix::fs::FileExt;
-            FileExt::read_at(self, buf, lba * 2048)?
+            Ok(FileExt::read_at(self, buf, lba * 2048)?)
         }
         #[cfg(not(unix))]
         {

src/lib.rs

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (MIT OR Apache-2.0)
 
-#![cfg_attr(feature = "nightly", feature(read_initializer, specialization))]
+#![cfg_attr(feature = "nightly", feature(min_specialization))]
 
 extern crate time;
 #[macro_use]