clarify stack contents in comments

diff --git a/ext/luawrapper/include/LuaContext.hpp b/ext/luawrapper/include/LuaContext.hpp
index 988d25523f63cab6ed4d558057e636d3c2cd2629..5982757baf70d007276a9744ba3868eea56feee8 100644 (file)
--- a/ext/luawrapper/include/LuaContext.hpp
+++ b/ext/luawrapper/include/LuaContext.hpp
@@ -1417,9 +1417,9 @@ private:
     }
     
     static int gettraceback(lua_State* L) {
-        lua_getglobal(L, "debug"); // stack: error, "debug"
-        lua_getfield(L, -1, "traceback"); // stack: error, "debug", debug.traceback
-        lua_remove(L, -2); // stack: error, debug.traceback
+        lua_getglobal(L, "debug"); // stack: error, debug library
+        lua_getfield(L, -1, "traceback"); // stack: error, debug library, debug.traceback function
+        lua_remove(L, -2); // stack: error, debug.traceback function
         lua_pushstring(L, ""); // stack: error, debug.traceback, ""
         lua_pushinteger(L, 2); // stack: error, debug.traceback, "", 2
         lua_call(L, 2, 1); // stack: error, traceback