bitbake: cooker: Shut down the parser in error state

If the cooker is in an error state, we shouldn't continue to try parsing.
This fixes an issue where an invalid PR server is detected when bitbake
is started and ensures bitbake exits cleanly rather than hanging.

[YOCTO #6934]

(Bitbake rev: 294bb9cad294423d4f8998405ceff58655f12660)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -1355,7 +1355,7 @@ class BBCooker:
         if self.state == state.running:
             return
 
-        if self.state in (state.shutdown, state.forceshutdown):
+        if self.state in (state.shutdown, state.forceshutdown, state.error):
             if hasattr(self.parser, 'shutdown'):
                 self.parser.shutdown(clean=False, force = True)
             raise bb.BBHandledException()