Accents in unquoted environment variables with spaces cause Compose v2 to fail

[jpetazzo]

Description

In a .env file, if there is a variable with a space, no quotes, and accents in the word(s) after the space, Compose refuses to start, with an error like the following one:

unexpected character "©" in variable name near "café\n"

Steps to reproduce the issue:

Create the following files:

mkdir -p /tmp/compose-v2-envaccents
cd /tmp/compose-v2-envaccents

cat >docker-compose.yml <<EOF
version: "3"

services:
  env:
    image: alpine
EOF

cat >.env <<EOF
WHAT=Pause café
EOF

Then docker-compose up.

Describe the results you received:

With Compose v1, it works correctly.

With Compose v2, I get the following error message and Compose refuses to start the stack:

unexpected character "©" in variable name near "café\n"

Describe the results you expected:

Stack starts correctly.

Additional information you deem important (e.g. issue happens only occasionally):

Note that this only happens when the accents are AFTER the space, and if the variable is NOT quoted.

Output of docker compose version:

Docker Compose version v2.0.1

Similar or related issues:

This could be related to #8626 and/or #8740, which are also related to .env parsing in Compose v2.

However, since it's a different error behavior altogether, I'm opening a separate issue to make sure it's tracked properly.

Thanks!

[nigurr]

+1 Any environment variable value with space is broken.
Surprised to see such regression

[ulyssessouza]

Seems related to #8763

[solvaholic]

Surprised to see such regression

See also #8507

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[stale]

This issue has been automatically closed because it had not recent activity during the stale period.