[BUG] docker compose {build, up} results in a crash instead of syntax error

[nfrmtk]

Description

hello
error occurred when i wrote such a beginning of a compose file:

version: '3.1'
include:
   a.yml

Steps To Reproduce

Basically description

mkdir tmp
cd tmp
echo "version: '3.1'
include: 
  a.yml" > docker-compose.yml
docker compose up

Compose Version

Docker Compose version v2.25.0

Docker Environment

Client: Docker Engine - Community
 Version:    26.0.0
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.13.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.25.0
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 6
  Running: 4
  Paused: 0
  Stopped: 2
 Images: 6
 Server Version: 26.0.0
 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: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.5.0-26-generic
 Operating System: Ubuntu 22.04.4 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 16
 Total Memory: 31.22GiB
 Name: nfrmtk-MS-7D17
 ID: 47f45fc6-2154-495f-8bdf-154c8cc45f74
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Username: nfrmtk
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Anything else?

No response

[ndeloof]

include attribute is a list, not single value. Use:

include:
   - a.yml