From 72b32ea2f8fe13694a379de8e02880c8b682e0ef Mon Sep 17 00:00:00 2001
From: Nicholas McDaniel <nickmcdaniel00@gmail.com>
Date: Sat, 22 Feb 2025 21:03:35 -0500
Subject: [PATCH] Prevent flow_forbid from being set without liquid present

---
 changelog.txt             | 1 +
 modtools/spawn-liquid.lua | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/changelog.txt b/changelog.txt
index 4965da0d76..c632f6f75f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -36,6 +36,7 @@ Template for new versions:
 
 ## Fixes
 - `position`: support for adv mode look cursor
+- `gui/liquids`: using the remove tool with magma selected will no longer create unexpected unpathable tiles
 
 ## Misc Improvements
 - `hide-tutorials`: handle tutorial popups for adventure mode
diff --git a/modtools/spawn-liquid.lua b/modtools/spawn-liquid.lua
index 419b0b4595..9a3d2417e8 100644
--- a/modtools/spawn-liquid.lua
+++ b/modtools/spawn-liquid.lua
@@ -21,6 +21,10 @@ function spawnLiquid(position, liquid_level, liquid_type)
   local map_block = dfhack.maps.getTileBlock(position)
   local tile = dfhack.maps.getTileFlags(position)
 
+  if liquid_level == 0 then
+    liquid_type = df.tile_liquid.Water
+  end
+
   tile.flow_size = liquid_level or 3
   tile.liquid_type = liquid_type
   tile.flow_forbid = liquid_type == df.tile_liquid.Magma or liquid_level >= 4
@@ -34,6 +38,8 @@ function spawnLiquid(position, liquid_level, liquid_type)
   z_level.update = true
   z_level.update_twice = true
 
+  df.global.world.reindex_pathfinding = true
+
   resetTemperature(position)
 end