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

["Gary D. Gregory (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IO-729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary D. Gregory resolved IO-729.
--------------------------------
    Resolution: Fixed

In git master, please verify and close.

> 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
>            Priority: Minor
>             Fix For: 2.12.0
>
>
> 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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