encoding/xml: marshaling/unmarshaling with namespace produces different results

[syphoxy]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.6.4 linux/amd64

Note: I did try this with go 1.8.3 and the issue still persists.

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/spyroboy/.go"
GORACE=""
GOROOT="/usr/lib/golang"
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GO15VENDOREXPERIMENT="1"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0"
CXX="g++"
CGO_ENABLED="1"

What did you do?

I'm trying to Marshal and Unmarshal XML data but it appears that there are discrepancies between how XML is parsed and how XML is generated.

What did you expect to see?

I expect that generating data is the same as parsing data.

What did you see instead?

https://play.golang.org/p/Rex8DuLaTZ

[syphoxy]

modifying the input string here to remove the attributes produces interesting results as well

https://play.golang.org/p/NSA4p4USVF

[mvdan]

I'm fairly sure this is a dup of #13400.

[syphoxy]

yeah it appears to be. sorry about that. I hope my playground example will help in finding a solution.