Don't lua_call evalfn in MJLuaRunString() if it's not a function. If …

…it's a string, which means it's an error, NSLog() it
Hammerspoon · Feb 17, 2015 · af770ef · af770ef
1 parent 1dbf0fa
commit af770ef
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/Hammerspoon/MJLua.m b/Hammerspoon/MJLua.m
@@ -125,6 +125,13 @@ void MJLuaTeardown(void) {
     lua_State* L = MJLuaState;
 
     lua_rawgeti(L, LUA_REGISTRYINDEX, evalfn);
+    if (!lua_isfunction(L, -1)) {
+        NSLog(@"ERROR: MJLuaRunString doesn't seem to have an evalfn");
+        if (lua_isstring(L, -1)) {
+            NSLog(@"evalfn appears to be a string: %s", lua_tostring(L, -1));
+        }
+        return @"";
+    }
     lua_pushstring(L, [command UTF8String]);
     lua_call(L, 1, 1);