top level public occurs errors

[znz]

Expected behavior

No errors.

Actual behavior

2 errors occurred:
An error occurred while Layout/EmptyLinesAroundAccessModifier cop was inspecting /t.rb:1:0.
An error occurred while Style/AccessModifierDeclarations cop was inspecting /t.rb:1:0.
Errors are usually caused by RuboCop bugs.

Steps to reproduce the problem

% docker run --rm -it ruby:2.7.2 /bin/sh -c 'gem i rubocop; echo public > t.rb; rubocop t.rb'
Fetching parallel-1.19.2.gem
Fetching parser-2.7.1.5.gem
Fetching rainbow-3.0.0.gem
Fetching regexp_parser-1.8.1.gem
Fetching rubocop-0.92.0.gem
Fetching rubocop-ast-0.7.1.gem
Fetching ruby-progressbar-1.10.1.gem
Fetching unicode-display_width-1.7.0.gem
Fetching ast-2.4.1.gem
Successfully installed parallel-1.19.2
Successfully installed ast-2.4.1
Successfully installed parser-2.7.1.5
Successfully installed rainbow-3.0.0
Successfully installed regexp_parser-1.8.1
Successfully installed rubocop-ast-0.7.1
Successfully installed ruby-progressbar-1.10.1
Successfully installed unicode-display_width-1.7.0
Successfully installed rubocop-0.92.0
9 gems installed
Inspecting 1 file
An error occurred while Layout/EmptyLinesAroundAccessModifier cop was inspecting /t.rb:1:0.
To see the complete backtrace run rubocop -d.
An error occurred while Style/AccessModifierDeclarations cop was inspecting /t.rb:1:0.
To see the complete backtrace run rubocop -d.
C

Offenses:

.rb:1:1: C: Style/FrozenStringLiteralComment: Missing frozen string literal comment.
public
^

1 file inspected, 1 offense detected, 1 offense auto-correctable

2 errors occurred:
An error occurred while Layout/EmptyLinesAroundAccessModifier cop was inspecting /t.rb:1:0.
An error occurred while Style/AccessModifierDeclarations cop was inspecting /t.rb:1:0.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
https://github.com/rubocop-hq/rubocop/issues

Mention the following information in the issue report:
0.92.0 (using Parser 2.7.1.5, rubocop-ast 0.7.1, running on ruby 2.7.2 x86_64-linux)