What steps will reproduce the problem?
If possible, include a link to a program on play.golang.org.
1. run `go test -coverprofile=coverage.out ./...`
What is the expected output?
coverage.out contains coverage all of the specified packages
What do you see instead?
`cannot use test profile flag with multiple packages`
Which compiler are you using (5g, 6g, 8g, gccgo)?
6g
Which operating system are you using?
OS X 10.9
Which version are you using? (run 'go version')
go version go1.2 darwin/amd64
Please provide any additional information below.
If I manually construct a coverage.out file from multiple packages, it seems to work
fine:
1. go test -coverprofile a.part ./a
2. go test -coverprofile b.part ./b
3. echo "mode: set" >coverage.out
4. grep -h -v "mode: set" *.part >>coverage.out
5. go tool cover -html=coverage.out
Why can't `go test -coverprofile` do this automatically?
