Trejkaz created JRUBY-6284:
------------------------------
Summary: Calls to Kernel#exit result in an exception printed on
stderr
Key: JRUBY-6284
URL: https://jira.codehaus.org/browse/JRUBY-6284
Project: JRuby
Issue Type: Bug
Components: Embedding
Affects Versions: JRuby 1.6.5, JRuby 1.6.1
Reporter: Trejkaz
The following test:
{code}
@Test
public void testJRubyExitBehaviour() throws Exception
{
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByExtension("rb");
try
{
engine.eval("exit 3");
fail("Expected ScriptException");
}
catch (ScriptException e)
{
// Expected
}
}
{code}
The test itself does actually pass, but what's bad here is that it logs the
following to stderr:
{code}
SystemExit: exit
exit at org/jruby/RubyKernel.java:867
exit at org/jruby/RubyKernel.java:836
(root) at <script>:1
org.jruby.embed.EvalFailedException: (SystemExit) exit
at
org.jruby.embed.internal.EmbedEvalUnitImpl.run(EmbedEvalUnitImpl.java:127)
at org.jruby.embed.jsr223.JRubyEngine.eval(JRubyEngine.java:90)
at org.jruby.embed.jsr223.JRubyEngine.eval(JRubyEngine.java:153)
at
com.nuix.script.TestScriptUtils.testJRubyExitBehaviour(TestScriptUtils.java:25)
...26 lines elided...
Caused by: org.jruby.exceptions.RaiseException: (SystemExit) exit
{code}
This makes it difficult if you're trying to write a command-line application
which wants to display a nice usage message to the user and then exit - they
can't read the usage message because they get a page full of errors after it.
The main jruby runtime itself doesn't appear to do this with the same kind of
script, so I figure the error is limited to when you're embedding.
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