title: Eclipse PyDev PyQt5 - where does stderr go?
body: <p>I've installed PyDev on Eclipse 2020-09, and I'm now experimenting with PyQt5.</p>
  <p>When I've put in some code which is bad in some way, so bad that the PyQt5 code exits, and the main GUI window disappears, I can't see any error message or traceback in the console.</p>
  <p>The console only outputs <code>print</code> statements (<code>stdout</code>).</p>
  <p>I can see that the button &quot;Show console when standard error changes&quot; (at the bottom, in the console dialog) is depressed, if this is relevant.</p>
  <p>If I run the file at the W10 CLI I get a proper traceback print out.</p>