Core: trace error to player, if possible.

[Berserker66]

What is this fixing or adding?

Exception: Exception in <bound method StardewValleyWorld.create_items of <worlds.stardew_valley.StardewValleyWorld object at 0x000001CB2EF3BD90>> for player 4, named Tester

How was this tested?

By crashing SDV

If this makes graphical changes, please attach screenshots.

[Berserker66]

Not sure how to best deal with that test failure. I could copy the original error text, but that changes design just to satisfy a unittest and that's the wrong way around in my opinion.

[black-sliver]

Assuming you want the outer exception be what it is (I don't think the "direct cause of ..." is easily readable), the one solution that comes to mind is to implement a custom assertRaisesRegexCause or, if it's just one instance, implement that one test by hand

try:
    self.world_setup()
except Exception ex:  # we should use a custom exception class for the step failure so this is not too wide
    self.assertEqual(str(ex), "Number of items in custom_item_pool (26) is greater than blue_chest_count (25)")
else:
    raise Exception("Expected exception")

[el-u]

Stuff like this make you wish you could use PEP 678.