If my image doesn't build (for example I Ctrl+C a bitbake core-image-sato early before it completes I'm now seeing:

NOTE: Writing buildhistory
ERROR: Execution of event handler 'toaster_buildhistory_dump' failed
Traceback (most recent call last):
  File "/media/build1/poky/meta/classes/toaster.bbclass", line 335, in toaster_buildhistory_dump(e=<bb.event.BuildCompleted object at 0x7f9e9b1b51d0>):
     
    >            with open("%s/files-in-image.txt" % installed_img_path, "r") as fin:
                     for line in fin:
FileNotFoundError: [Errno 2] No such file or directory: '/media/build1/poky/build/buildhistory/images/genericx86_64/glibc/core-image-sato/files-in-image.txt'

ERROR: Running idle function
Traceback (most recent call last):
  File "/media/build1/poky/bitbake/lib/bb/cooker.py", line 1400, in buildTargetsIdle(server=<ProcessServer(ProcessServer-1, started)>, rq=<bb.runqueue.RunQueue object at 0x7f9e9ba30f60>, abort=False):
                 if not retval:
    >                bb.event.fire(bb.event.BuildCompleted(len(rq.rqdata.runtaskentries), buildname, targets, failures, interrupted), self.data)
                     self.command.finishAsyncCommand(msg)
  File "/media/build1/poky/bitbake/lib/bb/event.py", line 174, in fire(event=<bb.event.BuildCompleted object at 0x7f9e9b1b51d0>, d=<bb.data_smart.DataSmart object at 0x7f9ea2f6cd30>):
     
    >    fire_class_handlers(event, d)
         if worker_fire:
  File "/media/build1/poky/bitbake/lib/bb/event.py", line 112, in fire_class_handlers(event=<bb.event.BuildCompleted object at 0x7f9e9b1b51d0>, d=<bb.data_smart.DataSmart object at 0x7f9ea2f6cd30>):
                         continue
    >            execute_handler(name, handler, event, d)
     
  File "/media/build1/poky/bitbake/lib/bb/event.py", line 84, in execute_handler(name='toaster_buildhistory_dump', handler=<function toaster_buildhistory_dump at 0x7f9eb1ef7378>, event=<bb.event.BuildCompleted object at 0x7f9e9b1b51d0>, d=<bb.data_smart.DataSmart object at 0x7f9ea2f6cd30>):
         try:
    >        ret = handler(event)
         except (bb.parse.SkipRecipe, bb.BBHandledException):
  File "/media/build1/poky/meta/classes/toaster.bbclass", line 335, in toaster_buildhistory_dump(e=<bb.event.BuildCompleted object at 0x7f9e9b1b51d0>):
     
    >            with open("%s/files-in-image.txt" % installed_img_path, "r") as fin:
                     for line in fin:
FileNotFoundError: [Errno 2] No such file or directory: '/media/build1/poky/build/buildhistory/images/genericx86_64/glibc/core-image-sato/files-in-image.txt'