func lfstackpush(head *uint64, node *lfnode) {
node.pushcnt++
new := lfstackPack(node, node.pushcnt)
+ if node1, _ := lfstackUnpack(new); node1 != node {
+ println("runtime: lfstackpush invalid packing: node=", node, " cnt=", hex(node.pushcnt), " packed=", hex(new), " -> node=", node1, "\n")
+ gothrow("lfstackpush")
+ }
for {
old := atomicload64(head)
node.next = old