Merge pull request #5406 from jsternberg/client-nil-reference #5139

Job	Run time
govulncheck	1m 21s
prepare	6s
binaries (darwin/amd64)	1m 0s
binaries (darwin/arm64)	1m 1s
binaries (linux/amd64)	2m 2s
binaries (linux/arm/v7)	2m 4s
binaries (linux/arm64)	2m 12s
binaries (linux/s390x)	1m 59s
binaries (linux/ppc64le)	2m 8s
binaries (linux/riscv64)	2m 18s
binaries (windows/amd64)	1m 52s
binaries (windows/arm64)	1m 50s
test / prepare	1m 50s
test / run (containerd, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	7m 47s
test / run (containerd-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integr...	9m 11s
test / run (containerd-1.6, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	7m 25s
test / run (containerd-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./fronte...	8m 40s
test / run (oci, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 12s
test / run (oci-rootless, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, integration)	5m 33s
test / run (oci-rootless-slirp4netns-detachnetns, ./client ./cmd/buildctl ./worker/containerd ./solver ....	5m 42s
test / run (oci-snapshotter-stargz, ./client ./cmd/buildctl ./worker/containerd ./solver ./frontend, int...	5m 29s
test / run (./..., 1, integration gateway)	4m 31s
test / run (./client, containerd, nydus, integration)	7m 24s
test / run (./client, oci, nydus, integration)	5m 3s
test / run (./..., nydus, 1, integration)	4m 37s
image	0s
scout	0s
release	0s
	1h 38m 17s

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