From d146d90131a5087698cbf67a9fc085ce3da2f362 Mon Sep 17 00:00:00 2001
From: NewSoupVi <57900059+NewSoupVi@users.noreply.github.com>
Date: Mon, 25 Aug 2025 17:52:04 +0200
Subject: [PATCH] Core: Fix Priority Fill *not* crashing when it should, in
 cases where there is no deprioritized progression #5363

---
 Fill.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Fill.py b/Fill.py
index 1cc1278f..7a079fbc 100644
--- a/Fill.py
+++ b/Fill.py
@@ -549,10 +549,12 @@ def distribute_items_restrictive(multiworld: MultiWorld,
         if prioritylocations and regular_progression:
             # retry with one_item_per_player off because some priority fills can fail to fill with that optimization
             # deprioritized items are still not in the mix, so they need to be collected into state first.
+            # allow_partial should only be set if there is deprioritized progression to fall back on.
             priority_retry_state = sweep_from_pool(multiworld.state, deprioritized_progression)
             fill_restrictive(multiworld, priority_retry_state, prioritylocations, regular_progression,
                              single_player_placement=single_player, swap=False, on_place=mark_for_locking,
-                             name="Priority Retry", one_item_per_player=False, allow_partial=True)
+                             name="Priority Retry", one_item_per_player=False,
+                             allow_partial=bool(deprioritized_progression))
 
         if prioritylocations and deprioritized_progression:
             # There are no more regular progression items that can be placed on any priority locations.