This flag determines whether a given RegionAllocatorStack is scanned for
pointers by the garbage collector (GC). If yes, the entire stack is scanned,
not just the part currently in use, since there is currently no efficient way to
modify the bounds of a GC region. The stack is scanned conservatively, meaning
that any bit pattern that would point to GC-allocated memory if interpreted as
a pointer is considered to be a pointer. This can result in GC-allocated
memory being retained when it should be freed. Due to these caveats,
it is recommended that any stack scanned by the GC be small and/or short-lived.
This flag determines whether a given RegionAllocatorStack is scanned for pointers by the garbage collector (GC). If yes, the entire stack is scanned, not just the part currently in use, since there is currently no efficient way to modify the bounds of a GC region. The stack is scanned conservatively, meaning that any bit pattern that would point to GC-allocated memory if interpreted as a pointer is considered to be a pointer. This can result in GC-allocated memory being retained when it should be freed. Due to these caveats, it is recommended that any stack scanned by the GC be small and/or short-lived.