Let subclasses of CountingInputStream.afterRead(int) throw IOException

Author: garydgregory

src/changes/changes.xml

@@ -84,6 +84,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action dev="ggregory" type="fix" issue="IO-818" due-to="Gary Gregory">NullInputStream breaks InputStream's read method contract.</action>
       <action dev="ggregory" type="fix"                due-to="Elliotte Rusty Harold">Javadoc shouldn't reference 1.x behavior #539.</action>
       <action dev="ggregory" type="fix" issue="IO-829" due-to="Elliotte Rusty Harold, Gary Gregory">Don't decode and reencode characters in a potentially different charset in AbstractOrigin.CharSequenceOrigin.getReader(Charset).</action>
+      <action dev="ggregory" type="fix" due-to="Gary Gregory">Let subclasses of CountingInputStream.afterRead(int) throw IOException.</action>
       <!-- Add -->
       <action dev="ggregory" type="add"                due-to="Gary Gregory">Add and use PathUtils.getFileName(Path, Function&lt;Path, R&gt;).</action>
       <action dev="ggregory" type="add"                due-to="Gary Gregory">Add and use PathUtils.getFileNameString().</action>

src/main/java/org/apache/commons/io/input/CountingInputStream.java

@@ -47,10 +47,11 @@ public CountingInputStream(final InputStream in) {
      * Adds the number of read bytes to the count.
      *
      * @param n number of bytes read, or -1 if no more bytes are available
+     * @throws IOException Not thrown here but subclasses may throw.
      * @since 2.0
      */
     @Override
-    protected synchronized void afterRead(final int n) {
+    protected synchronized void afterRead(final int n) throws IOException {
         if (n != EOF) {
             count += n;
         }