diff --git a/Module.h b/Module.h
index daca15078..cd8ae1fb5 100644
--- a/Module.h
+++ b/Module.h
@@ -94,7 +94,7 @@ class Module : public PScope, public LineInfo {
 	   module is elaborated. During parsing, I put the parameters
 	   into this map. */
       struct param_expr_t : public LineInfo {
-	    param_expr_t() : range(0) { }
+	    param_expr_t() : type(IVL_VT_NO_TYPE), msb(0), lsb(0), signed_flag(false), expr(0), range(0) { }
 	      // Type information
 	    ivl_variable_type_t type;
 	    PExpr*msb;
diff --git a/ivl.def b/ivl.def
index 7c46bfbfd..6a74bf7cb 100644
--- a/ivl.def
+++ b/ivl.def
@@ -53,6 +53,9 @@ ivl_file_table_index
 ivl_file_table_item
 ivl_file_table_size
 
+ivl_island_flag_set
+ivl_island_flag_test
+
 ivl_logic_attr
 ivl_logic_attr_cnt
 ivl_logic_attr_val
diff --git a/net_design.cc b/net_design.cc
index 25845240a..05cd2cfb8 100644
--- a/net_design.cc
+++ b/net_design.cc
@@ -529,6 +529,10 @@ void NetScope::evaluate_parameters(Design*des)
 		  cerr << (*cur).second.get_fileline() << ": internal error: "
 		       << "Unexpected expression type " << (*cur).second.type
 		       << "." << endl;
+		  cerr << (*cur).second.get_fileline() << ":               : "
+		       << "Parameter name: " << (*cur).first << endl;
+		  cerr << (*cur).second.get_fileline() << ":               : "
+		       << "Expression is: " << *(*cur).second.expr << endl;
 		  ivl_assert((*cur).second, 0);
 		  break;
 	    }
diff --git a/net_scope.cc b/net_scope.cc
index 4425a2a49..c8a986fb2 100644
--- a/net_scope.cc
+++ b/net_scope.cc
@@ -121,6 +121,9 @@ NetExpr* NetScope::set_parameter(perm_string key, NetExpr*expr,
       ivl_assert(file_line, ref.range == 0);
       ref.range = range_list;
       ref.set_line(file_line);
+
+      ivl_assert(file_line, type != IVL_VT_NO_TYPE);
+
       return res;
 }
 
diff --git a/netlist.cc b/netlist.cc
index 22c9f03ee..fefd23581 100644
--- a/netlist.cc
+++ b/netlist.cc
@@ -761,10 +761,6 @@ NetPartSelect::NetPartSelect(NetNet*sig, unsigned off, unsigned wid,
 	    pin(0).set_dir(Link::INPUT);
 	    pin(1).set_dir(Link::OUTPUT);
 	    break;
-	  case NetPartSelect::BI:
-	    pin(0).set_dir(Link::OUTPUT);
-	    pin(1).set_dir(Link::OUTPUT);
-	    break;
       }
       pin(0).set_name(perm_string::literal("Part"), 0);
       pin(1).set_name(perm_string::literal("Vect"), 0);
@@ -787,10 +783,6 @@ NetPartSelect::NetPartSelect(NetNet*sig, NetNet*sel,
 	    pin(0).set_dir(Link::INPUT);
 	    pin(1).set_dir(Link::OUTPUT);
 	    break;
-	  case NetPartSelect::BI:
-	    pin(0).set_dir(Link::PASSIVE);
-	    pin(1).set_dir(Link::PASSIVE);
-	    break;
       }
       pin(2).set_dir(Link::INPUT);
 
diff --git a/parse.y b/parse.y
index 16702ccf9..0775a325c 100644
--- a/parse.y
+++ b/parse.y
@@ -2486,7 +2486,7 @@ localparam_assign_decl
     localparam_assign_list
       { param_active_range = 0;
 	param_active_signed = false;
-	param_active_type = IVL_VT_NO_TYPE;
+	param_active_type = IVL_VT_LOGIC;
       }
   | K_integer
       { param_active_range = 0;
@@ -2496,7 +2496,7 @@ localparam_assign_decl
     localparam_assign_list
       { param_active_range = 0;
 	param_active_signed = false;
-	param_active_type = IVL_VT_NO_TYPE;
+	param_active_type = IVL_VT_LOGIC;
       }
   | K_real
       { param_active_range = 0;
@@ -2506,7 +2506,7 @@ localparam_assign_decl
     localparam_assign_list
       { param_active_range = 0;
 	param_active_signed = false;
-	param_active_type = IVL_VT_NO_TYPE;
+	param_active_type = IVL_VT_LOGIC;
       }
   ;