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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