Command writing to standard error does not produce output to ccnet project report? - cruisecontrol.net

Question

I wrote a small c program like this:
#include<stdio.h>
#include<windows.h>
void main()
{
fputs("test\r\n", stderr);
fflush(stderr);
ExitProcess(-1);
}
and included it like this in ccnet.config:
<project name="foobar">
<tasks>
<exec>
<executable>C:\temp\test.exe</executable>
</exec>
</tasks>
</project>
When I forced the foobar project, I got not output whatsoever in the project report.
Why?
I may also mention that if I deliberately misspell the exe-filename, I get an exception (which I appreciate).
Edit:
When debugging CruiseControl.NET, writing a test that tries to run the exe file
that looks like this
[Test]
public void FooTest()
{
const string xml = "<exec executable=\"C:\\temp\\test.exe\"><buildArgs></buildArgs></exec>";
task = (ExecutableTask) NetReflector.Read(xml);
var result = (IntegrationResult) IntegrationResult();
result.Label = "1.0";
result.BuildCondition = BuildCondition.ForceBuild;
result.WorkingDirectory = #"c:\temp\";
result.ArtifactDirectory = #"c:\temp\";
task.Run(result);
Assert.AreEqual(IntegrationStatus.Failure, result.Status);
Assert.IsFalse(task.WasSuccessful);
var firstTaskResult = (ProcessTaskResult)result.TaskResults[0];
Debug.WriteLine(firstTaskResult.Data);
}
The debug console will output xml like this:
<buildresults>
<task>
<buildArgs />
<buildTimeoutSeconds>600</buildTimeoutSeconds>
<baseDirectory />
<dynamicValues />
<environment />
<executable>C:\temp\test.exe</executable>
<priority>Normal</priority>
<successExitCodes />
</task>
<message level="Error">test</message>
</buildresults>
(note, I did beautify this xml before adding it here).