$ sudo ubuntu-device-flash --verbose core --channel=edge --output=/tmp/snappy.img --developer-mode rolling
Determining oem configuration
Starting download of generic-amd64
41.70 KB / 41.70 KB [==============================================] 100.00 % 320.97 KB/s 
Done
Starting download of icon for package
38.97 KB / 38.97 KB [==============================================] 100.00 % 325.49 KB/s 
Done
Fetching information from server...
Downloading and setting up...
Download finished for /home/martin/.cache/ubuntuimages/ubuntu-core/rolling/edge/generic_amd64/version-103.tar.xz
Download finished for /home/martin/.cache/ubuntuimages/pool/ubuntu-91f4f3372bb4fa7305dba0583be51016bdd58b7ef18b4665a3bf4af1cb0995a7.tar.xz
Searching for hardware.yaml in device part
Download finished for /home/martin/.cache/ubuntuimages/pool/device-d2fd61d990dfa004a5ca0ae705e62fc2ce6ecea4adaefa8bd56834f94e2808df.tar.xz
Partitioning...
Mapping...
Formatting...
Mounting...
panic: cannot double map partitions

goroutine 1 [running, locked to thread]:
launchpad.net/goget-ubuntu-touch/diskimage.(*BaseImage).Map(0xc208057600, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/diskimage/common.go:294 +0xc5
launchpad.net/goget-ubuntu-touch/diskimage.(*BaseImage).Mount(0xc208057600, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/diskimage/common.go:203 +0x5d
main.(*Snapper).setup(0xcfdc28, 0xc2082494a0, 0x3, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/snappy.go:343 +0x15b
main.(*Snapper).deploy(0xcfdc28, 0xc2082b8fc0, 0xc2082494a0, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/snappy.go:409 +0x130
main.(*Snapper).create(0xcfdc28, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/snappy.go:553 +0x12aa
main.(*CoreCmd).Execute(0xcfdc00, 0xc208052bd0, 0x1, 0x7, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/core.go:82 +0x458
github.com/jessevdk/go-flags.(*Parser).ParseArgs(0xc2080606c0, 0xc20800a000, 0x7, 0x7, 0x0, 0x0, 0x0, 0x0, 0x0)
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/github.com/jessevdk/go-flags/parser.go:241 +0x8b8
main.main()
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/main.go:62 +0x3ac

goroutine 5 [syscall]:
os/signal.loop()
	/usr/lib/go/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init·1
	/usr/lib/go/src/os/signal/signal_unix.go:27 +0x35

goroutine 6 [chan receive]:
launchpad.net/snappy/partition.func·007()
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/snappy/partition/partition.go:134 +0x52
created by launchpad.net/snappy/partition.setupSignalHandler
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/snappy/partition/partition.go:139 +0x21e

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
	/usr/lib/go/src/runtime/asm_amd64.s:2232 +0x1

goroutine 45 [chan receive]:
main.func·005()
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/snappy.go:547 +0x1e8
created by main.(*Snapper).create
	/build/goget-ubuntu-touch-3MD6Z_/goget-ubuntu-touch-0.26/obj-x86_64-linux-gnu/src/launchpad.net/goget-ubuntu-touch/ubuntu-device-flash/snappy.go:550 +0x1277