Fix crash when data.stop_ids == nil

Cause unclear, probably bad migration from older version. Added workaround by checking if data.stop_ids ~= nil before using it.
eduran84 · Jun 10, 2019 · 7e1213c · 7e1213c
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commit 7e1213c
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diff --git a/changelog.txt b/changelog.txt
@@ -1,3 +1,10 @@
+---------------------------------------------------------------------------------------------------
+Version: 0.10.9
+Date: 2019-06-10
+
+  Bugfixes:
+    - Fixed crash on placing first LTN stop (https://mods.factorio.com/mod/LTN_Tracker/discussion/5cfd4f17d9e222000bc70d44)
+
 ---------------------------------------------------------------------------------------------------
 Version: 0.10.8
 Date: 2019-04-28

diff --git a/info.json b/info.json
@@ -1,6 +1,6 @@
 {
 "name": "LTN_Tracker",
-"version": "0.10.8",
+"version": "0.10.9",
 "title": "LTN Tracker",
 "author": "eduran",
 "contact": "https://forums.factorio.com/memberlist.php?mode=viewprofile&u=1699",

diff --git a/script/data_processing.lua b/script/data_processing.lua
@@ -158,8 +158,7 @@ local function update_stops(stop_id) -- state 1
 end
 
 local function check_for_new_stops()
-  if not data.stop_ids then log2(data) end
-  for _, stop_id in pairs(data.stop_ids) do
+  for _, stop_id in pairs(data.stop_ids or {}) do
     if not raw.stops[stop_id] then
       ui.clear_station_filter()
       break