r13796
Fix inaccuracy introduced in commit 351b1ce1b4d4e20cb74dae8b12ace0f9e… …d43d10f (#754) Kill the last callback process when picking up flag
Fix inaccuracy introduced in commit 351b1ce1b4d4e20cb74dae8b12ace0f9e… …d43d10f (#754) Kill the last callback process when picking up flag