%Error: t/t_concat_link_bad.v:24: Syntax Error: Not expecting REPLICATE under a DOT in dotted expression
    assign bar_s = {foo_s, foo_s}.f1;
                   ^
%Error: t/t_concat_link_bad.v:24: Syntax Error: Not expecting CONCAT under a REPLICATE in dotted expression
    assign bar_s = {foo_s, foo_s}.f1;
                         ^
%Error: t/t_concat_link_bad.v:24: Syntax Error: Not expecting CONST under a REPLICATE in dotted expression
    assign bar_s = {foo_s, foo_s}.f1;
                   ^
%Warning-IMPLICIT: t/t_concat_link_bad.v:24: Signal definition not found, creating implicitly: 'bar_s'
    assign bar_s = {foo_s, foo_s}.f1;
           ^~~~~
                   ... Use "/* verilator lint_off IMPLICIT */" and lint_on around source to disable this message.
%Error: Exiting due to