Another strange icarus expression eval bug (large shifts)

For b != 0 this should return y[3:2] == 0.

module issue_048(a, b, y);
  input [1:0] a;
  input [2:0] b;
  output [3:0] y;
  assign y = {a >> {22{b}}, a << (0 <<< b)};
endmodule

But iverilog 020e280 returns y[3:2] == y[1:0] instead.

History:
2014-05-19 Reported bug on GitHub
2014-05-20 Fixed in GIT b7b77b2