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Gareth Rees 2b679e0f02 Fix scanning/walking for snc: ... Record which segments are free and don't walk them (objects in these segments are dead). If a buffered segment has a pending pop, don't scan or walk objects beyond the address that's going to be popped to (these objects are also dead). Don't try to do a lightweight pop to an address that's not in the segment attached to the buffer -- the segment being popped to (and any other segments on the stack in between) are now dead, and the only way to mark them as being dead is to do a heavyweight pop. Copied from Perforce Change: 187224 ServerID: perforce.ravenbrook.com		2014-10-12 15:20:57 +01:00
mps	Fix scanning/walking for snc:	2014-10-12 15:20:57 +01:00