[v23 regression] docker build --build-arg =TEST_STRING no longer fails #2022
Description
Description
DOCKER_BUILDKIT=1 docker build --build-arg =TEST_STRING no longer fails since v23
v20.10.24
$ DOCKER_BUILDKIT=0 docker build --build-arg =TEST_STRING .
invalid argument "=TEST_STRING" for "--build-arg" flag: invalid environment variable: =TEST_STRING
See 'docker build --help'.
$ DOCKER_BUILDKIT=1 docker build --build-arg =TEST_STRING .
invalid argument "=TEST_STRING" for "--build-arg" flag: invalid environment variable: =TEST_STRING
See 'docker build --help'.v23.0.6, v24.0.5
$ DOCKER_BUILDKIT=0 docker build --build-arg =TEST_STRING .
DEPRECATED: The legacy builder is deprecated and will be removed in a future release.
BuildKit is currently disabled; enable it by removing the DOCKER_BUILDKIT=0
environment-variable.
invalid argument "=TEST_STRING" for "--build-arg" flag: invalid environment variable: =TEST_STRING
See 'docker build --help'.
$ DOCKER_BUILDKIT=1 docker build --build-arg =TEST_STRING .
[+] Building 0.0s (3/3) FINISHED docker:default
...
(no error)Reproduce
DOCKER_BUILDKIT=1 docker build --build-arg =TEST_STRING
Expected behavior
Should fail with an error like invalid argument "=TEST_STRING" for "--build-arg" flag: invalid environment variable: =TEST_STRING
docker version
Client:
Version: 24.0.5
API version: 1.43
Go version: go1.20.6
Git commit: ced0996
Built: Fri Jul 21 20:34:32 2023
OS/Arch: linux/amd64
Context: default
Server: Docker Engine - Community
Engine:
Version: 24.0.5
API version: 1.43 (minimum version 1.12)
Go version: go1.20.6
Git commit: a61e2b4
Built: Fri Jul 21 20:35:56 2023
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: v1.7.1
GitCommit: 1677a17964311325ed1c31e2c0a3589ce6d5c30d
runc:
Version: 1.1.8
GitCommit: v1.1.8-0-g82f18fe
docker-init:
Version: 0.19.0
GitCommit: de40ad0docker info
Client:
Version: 24.0.5
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.11.2
Path: /usr/local/libexec/docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.20.2
Path: /usr/local/libexec/docker/cli-plugins/docker-compose
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 1
Server Version: 24.0.5
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 1677a17964311325ed1c31e2c0a3589ce6d5c30d
runc version: v1.1.8-0-g82f18fe
init version: de40ad0
Security Options:
apparmor
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.2.0-26-generic
Operating System: Alpine Linux v3.18 (containerized)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 15.57GiB
Name: cdba30409c70
ID: 5a603912-b731-4b97-aad1-91e31bdcb2cd
Docker Root Dir: /var/lib/docker
Debug Mode: false
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
Product License: Community EngineAdditional Info
No response