E2057 Unexpected end of file in comment started on line %ld (Delphi)

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This error occurs when you open a comment, but do not close it.

Note that a comment started with '{' must be closed with '}', and a comment started with '(*' must be closed with '*)'.

program Produce;
(*Let's start a comment here but forget to close it
begin
end.

So the example just didn't close the comment.

program Solve;
(*Let's start a comment here and not forget to close it*)
begin
end.

Doing so fixes the problem.