// iterating through the linked list they are in reverse order.
cas = nil
sglist = gp.waiting
- // Clear all selectdone and elem before unlinking from gp.waiting.
- // They must be cleared before being put back into the sudog cache.
- // Clear before unlinking, because if a stack copy happens after the unlink,
- // they will not be updated, they will be left pointing to the old stack,
- // which creates dangling pointers, which may be detected by the
- // garbage collector.
+ // Clear all elem before unlinking from gp.waiting.
for sg1 := gp.waiting; sg1 != nil; sg1 = sg1.waitlink {
sg1.selectdone = nil
sg1.elem = nil