This file is just output that I received when I added some
meta_warning's to the code to print out the function that was running
and some important variables from them.  The two cases below
correspond to trying this out with both the right and left alt keys;
each shows a trace just after I release the alt key.

Using Alt_R:
Window manager warning: Running in process_tab_grab..
Window manager warning:   Running inside keycode_is_primary_modifier...
Window manager warning:     keycode             = 71
Window manager warning:     entire_binding_mask = 8
Window manager warning:     Checking whether code 0x71 is the primary modifier of mask 0x8
Window manager warning:     primary_modifier = 8
Window manager warning:     Running inside is_specific_modifier...
Window manager warning:       Checking whether code 0x71 is bound to modifier 0x8
Window manager warning:       Modifier has index 3
Window manager warning:       i   = 9
Window manager warning:       end = 12
Window manager warning:       retval = 0

Using Alt_L:
Window manager warning: Running in process_tab_grab..
Window manager warning:   Running inside keycode_is_primary_modifier...
Window manager warning:     keycode             = 40
Window manager warning:     entire_binding_mask = 8
Window manager warning:     Checking whether code 0x40 is the primary modifier of mask 0x8
Window manager warning:     primary_modifier = 8
Window manager warning:     Running inside is_specific_modifier...
Window manager warning:       Checking whether code 0x40 is bound to modifier 0x8
Window manager warning:       Modifier has index 3
Window manager warning:       i   = 9
Window manager warning:       end = 12
Window manager warning:       retval = 1
