Can't locate object method "psgi_flatten" via package "HTTP::Headers::Fast"

[eserte]

On some of my smokers (probably ones with older module versions installed) the test suite fails like this:

...
    #   Failed test 'header is evaluated against its schema'
    #   at t/validate_response.t line 307.
    # Compared $data->{"errors"}[0]{"error"}
    #    got : 'EXCEPTION: Can't locate object method "psgi_flatten" via package "HTTP::Headers::Fast" at /home/cpansand/.cpan/build/2023123108/OpenAPI-Modern-0.055-PIi9fD/blib/lib/OpenAPI/Modern.pm line 831.
    # '
    # expect : 'pattern does not match'
...

There are also variations with "HTTP::Headers" instead of "HTTP::Headers::Fast".

[karenetheridge]

thanks, should be fixed in 0.056.