RaiseException.printStackTrace() gives RaiseException: can't convert nil into
String
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Key: JRUBY-3961
URL: http://jira.codehaus.org/browse/JRUBY-3961
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.3.1
Reporter: Trejkaz
I constructed a unit test like this:
@Test
public void testErrorBehaviourForUnknownSymbol() throws Exception
{
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByExtension("rb");
try
{
engine.eval("no_method_with_this_name");
fail("Expected ScriptException");
}
catch (ScriptException e)
{
RaiseException cause = (RaiseException) e.getCause();
// Neither printStackTrace nor toString should throw exceptions.
cause.toString();
//noinspection IOResourceOpenedButNotSafelyClosed
cause.printStackTrace(new PrintWriter(new StringWriter()));
}
}
This fails at printStackTrace with:
org.jruby.exceptions.RaiseException: can't convert nil into String
:1: can't convert nil into String (TypeError)
...internal jruby stack elided...
from (unknown).(unknown)(:1)
from (unknown).(unknown)(:1)
It gets to here in RaiseException:
if (runtime.getNil() != backtrace) {
String firstLine =
backtrace.callMethod(runtime.getCurrentContext(),
"first").convertToString().toString(); // <- THIS LINE
ps.print(firstLine + ": ");
}
And then up to here in RubyBasicObject:
public RubyString convertToString() {
return (RubyString) TypeConverter.convertToType(this,
getRuntime().getString(), "to_str");
}
At that point I'm not sure what to do.
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