_memory_usage() returns negative num_objects value
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=2625
Reported by Martin Nilsson, IDA nilsson@pike.ida.liu.se
Pike v7.3 release 12 running Hilfe v2.0 (Incremental Pike Frontend)
> _memory_usage();
Result: ([ /* 18 elements */
"array_bytes":17804,
"callable_bytes":8200,
"callback_bytes":2052,
"frame_bytes":10756,
"mapping_bytes":52295,
"multiset_bytes":304,
"num_arrays":159,
"num_callables":220,
"num_callbacks":2,
"num_frames":9,
"num_mappings":45,
"num_multisets":19,
"num_objects":-56,
"num_programs":104,
"num_strings":2922,
"object_bytes":185076,
"program_bytes":563152,
"string_bytes":109240
])