Verilator

Verilator fails with a flex scanner internal error if there is a space before the closing parenthesis in always (*). Attached example program @always_at.v.

// reproducer for the always @(*) bug.
// invocation: verilator -cc  always_at.v
module always_at(input wire foo, output wire bar);
  always @(* )
    bar = foo;
endmodule // always_at

Output from running Verilator

$ verilator -cc always_at.v 
%Error: always_at.v:9: EOF in (*
fatal flex scanner internal error--end of buffer missed
%Error: Command Failed _instdir_/verilator/verilator_bin -cc always_at.v