bymicah.stetson:

What steps will reproduce the problem?Run this program in the playground:http://play.golang.org/p/cWZcknG23DWhat is the expected output?1234234What do you see instead?1111222Which compiler are you using (5g, 6g, 8g, gccgo)?6gWhich operating system are you using?Mac OS X 10.7.5 and also the Go PlaygroundWhich version are you using?  (run 'go version')Tried with go 1.1 and go 1.1.1Please provide any additional information below.Disabling optimization with go build -gcflags -N makes the problem go away. So do anynumber of source-level changes.