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-rw-r--r--src/script/lua_api/l_mapgen.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp
index 825292419..7adb6a534 100644
--- a/src/script/lua_api/l_mapgen.cpp
+++ b/src/script/lua_api/l_mapgen.cpp
@@ -493,7 +493,7 @@ int ModApiMapgen::l_get_mapgen_object(lua_State *L)
EmergeManager *emerge = getServer(L)->getEmergeManager();
Mapgen *mg = emerge->getCurrentMapgen();
if (!mg)
- return 0;
+ throw LuaError("Must only be called in a mapgen thread!");
size_t maplen = mg->csize.X * mg->csize.Z;