Add regression test for issue #732.

ivtest/gold/br_gh732.gold

@@ -0,0 +1,7 @@
+                   0 x x x
+                1000 0 x x
+                1100 0 0 x
+                1200 0 0 0
+                2000 1 0 0
+                2100 1 1 0
+                2200 1 1 1

ivtest/ivltests/br_gh732.v

@@ -0,0 +1,37 @@
+`timescale 1ns/1ps
+
+module Buffer(output Y, input A);
+
+  specparam Delay = 0.1;
+
+  assign #Delay Y = A;
+
+endmodule
+
+module Buffer1(output Y, input A);
+  Buffer inst(.Y(Y), .A(A));
+endmodule
+
+module Buffer2(output Y, input A);
+  Buffer inst(.Y(Y), .A(A));
+endmodule
+
+`timescale 1ps/1ps
+
+module dut();
+
+reg  n1;
+wire n2;
+wire n3;
+
+Buffer1 b1(.A(n1), .Y(n2));
+Buffer2 b2(.A(n2), .Y(n3));
+
+initial begin
+  $monitor("%t %b %b %b", $time, n1, n2, n3);
+  #1000 n1 = 0;
+  #1000 n1 = 1;
+  #1000 $finish(0);
+end
+
+endmodule

ivtest/regress-vlg.list

@@ -348,6 +348,7 @@ br_gh632		normal			ivltests
 br_gh632b		normal,-S		ivltests
 br_gh632c		normal			ivltests
 br_gh674		normal			ivltests
+br_gh732		normal			ivltests gold=br_gh732.gold
 br_ml20150315		normal			ivltests gold=br_ml_20150315.gold
 br_ml20150321		CE			ivltests
 br_ml20150606		normal			ivltests