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-rw-r--r--src/scriptapi.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index 4b3fbe296..39e89ddb5 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -686,6 +686,8 @@ static NodeBox read_nodebox(lua_State *L, int index)
static void read_groups(lua_State *L, int index,
std::map<std::string, int> &result)
{
+ if (!lua_istable(L,index))
+ return;
result.clear();
lua_pushnil(L);
if(index < 0)