void runtime_warning(string subsystem, string msg, mixed|void data)
Called by the Pike runtime to warn about data inconsistencies.
Runtime subsystem where the warning was generated. Currently the following subsystems may call this function:
The garbage collector.
Warning message. Currently the following messages may be generated:
A cycle where the destruction order isn't deterministic was detected by the garbage collector.
data will in this case contain an array of the elements in the cycle.
Optional data that further describes the warning specified by msg .