CI lint can't process parallel:matrix if there is a variable starting with number followed by double underscore

Gitlab.com 14.10-pre

Following configuration results in “Coinfiguration validation is currently unavailable” in gitlab ci lint
Changing variable value to “1a_22” allows validation to complete successfully:

build:
    parallel:
        matrix:
          - MY_TARGET: [ "my_target1", "my_target2" ]
            SOME_VAR: "11__22"
    script:
       - echo $TEST

Hi @oksoff

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