runtime: goroutine stack exceeds 1000000000-byte limit

In snapd we build ubuntu-image with test keys like this:

go get github.com/canonical/ubuntu-image/cmd/ubuntu-image
go install -tags 'withtestkeys' github.com/canonical/ubuntu-image/cmd/ubuntu-image

Then when we try to build and ubuntu core image we get the following error

/home/gopath/bin/ubuntu-image snap -w /home/image /home/image/pc.model --channel edge --snap /home/image/pc-kernel_5.4.0-152.169.1_amd64.snap --snap /home/image/pc-repacked.snap --snap /home/image/core20.snap --snap /home/image/snapd_2.59.5+git966.gcc7fab5_amd64.snap --output-dir /home/image
[0] make_temporary_directories
[1] determine_output_directory
[2] prepare_image
WARNING: proceeding to download snaps ignoring validations, this default will change in the future. For now use --validation=enforce for validations to be taken into account, pass instead --validation=ignore to preserve current behavior going forward
WARNING: "snapd", "pc-kernel", "pc" installed from local snaps disconnected from a store cannot be refreshed subsequently!
[3] load_gadget_yaml
[4] set_artifact_names
[5] populate_rootfs_contents
[6] generate_disk_info
[7] calculate_rootfs_size
[8] populate_bootfs_contents
[9] populate_prepare_partitions
[10] make_disk
[11] generate_manifest
[12] finish
runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0xc0204643b0 stack=[0xc020464000, 0xc040464000]
fatal error: stack overflow

runtime stack:
runtime.throw({0xe9c13a?, 0x15695e0?})
 /snap/go/current/src/runtime/panic.go:1047 +0x5d fp=0x7f6bc9de3cc0 sp=0x7f6bc9de3c90 pc=0x436e1d
runtime.newstack()
 /snap/go/current/src/runtime/stack.go:1105 +0x5bd fp=0x7f6bc9de3e70 sp=0x7f6bc9de3cc0 pc=0x450c9d
runtime.morestack()
 /snap/go/current/src/runtime/asm_amd64.s:574 +0x8b fp=0x7f6bc9de3e78 sp=0x7f6bc9de3e70 pc=0x46794b