[jira] [Created] (IO-729) BrokenReader, BrokenWriter, BrokenInputStream, BrokenOutputStream can cause IllegalArgumentException in combination with try-with-resources

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

Rob Spoor created IO-729:
----------------------------

             Summary: BrokenReader, BrokenWriter, BrokenInputStream, BrokenOutputStream can cause IllegalArgumentException in combination with try-with-resources
                 Key: IO-729
                 URL: https://issues.apache.org/jira/browse/IO-729
             Project: Commons IO
          Issue Type: Bug
          Components: Streams/Writers
    Affects Versions: 2.8.0
            Reporter: Rob Spoor


The following little code snippet can cause an IllegalArgumentException with message "Self-suppression not permitted":
{code}        try (Writer writer = new BrokenWriter()) {
            writer.write('a');
        }{code}
The try-with-resources mechanism will try to add the exception thrown from {{close}} as suppress exception to the exception thrown from {{write}}. Since those are the same, an exception is thrown. From the source of java.lang.Throwable:
{code}    public final synchronized void addSuppressed(Throwable exception) {
        if (exception == this)
            throw new IllegalArgumentException(SELF_SUPPRESSION_MESSAGE, exception);{code}



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