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use wg.Done() isntead of wg.Add(-1)

Dominik Honnef authored on 2013/04/03 18:11:34
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@@ -23,7 +23,7 @@ func nuke(runtime *Runtime) error {
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 		wg.Add(1)
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 		go func(c *Container) {
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 			c.Kill()
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-			wg.Add(-1)
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+			wg.Done()
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 		}(container)
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 	}
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 	wg.Wait()