[jira] [Commented] (IO-799) [ReaderInputStream] Repeated calls to read() while EOF should keep returning -1

["jeroen (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IO-799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17729977#comment-17729977 ] 

jeroen commented on IO-799:
---------------------------

Reproduction:
{code:java}
public static void main(String[] args) throws IOException {
    try (ReaderInputStream reader = ReaderInputStream.builder().setCharset(StandardCharsets.UTF_8).setReader(new StringReader("123")).get()) {
        System.out.println(reader.read());
        System.out.println(reader.read());
        System.out.println(reader.read());
        System.out.println(reader.read());
        System.out.println(reader.read()); // This throws the exception.
    }
} {code}
 

> [ReaderInputStream] Repeated calls to read() while EOF should keep returning -1
> -------------------------------------------------------------------------------
>
>                 Key: IO-799
>                 URL: https://issues.apache.org/jira/browse/IO-799
>             Project: Commons IO
>          Issue Type: Improvement
>          Components: Streams/Writers
>    Affects Versions: 2.12.0
>         Environment: Ubuntu x64, Java 11.
>            Reporter: jeroen
>            Priority: Major
>
> Once a ReaderInputStream reaches the end of the input, it only returns -1 once. Subsequent calls to read() throw an IllegalStateException. This undocumented and unexpected.



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