Fixed compiler crash during code genration for type conversion (bug 541100)

Change-Id: I273b620304bd9dbb9252940759314124fba42028
Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>

compiler2/Value.cc

@@ -12723,7 +12723,8 @@ void Value::chk_expr_operand_execute_refd(Value *v1,
         if (!get_needs_conversion()) {
           u.ref.ref->generate_code_const_ref(expr);
         } else {
-          Type *my_gov = get_expr_governor_last();
+          Type *my_gov = my_governor != NULL ? my_governor->get_type_refd_last() : 
+            get_expr_governor_last();
           Type *refd_gov = u.ref.ref->get_refd_assignment()->get_Type()
             ->get_field_type(u.ref.ref->get_subrefs(),
             Type::EXPECTED_DYNAMIC_VALUE)->get_type_refd_last();

regression_test/typeCompat/Compat.ttcn

@@ -572,6 +572,34 @@ testcase tc_Templates() runs on Empty {
   if (match({ vm1, vm1 }, tp_rec9)) { setverdict(pass) } else { setverdict(fail) }
 }
 
+
+// Bug 541100 - Compiler crash during code generation for type conversion
+type record Rec1 {
+  integer x
+}
+
+type record Rec2 {
+  integer y
+}
+
+type record Main541100 {
+  Rec2 field
+}
+
+template (value) Main541100 t_541100(template(value) Rec2 p) := { p };
+
+const Rec1 c_541100 := { 1 };
+
+testcase tc_541100() runs on Empty {
+  template (value) Main541100 t_res := t_541100(c_541100); // parameter needs type conversion
+  if (not isvalue(t_res) or valueof(t_res) != { { 1 } }) {
+    setverdict(fail, t_res);
+  }
+  else {
+    setverdict(pass);
+  }
+}
+
 control {
   var myrec1 rec1 := { 66, 77 }
   var myrec2 rec2 := { 88, 99 }
@@ -593,6 +621,7 @@ control {
   execute(Std.tc_Unions())
   execute(Std.tc_Anytypes())
   execute(Std.tc_Substruct())
+  execute(tc_541100());
 }
 
 } with { extension "anytype myrec1, myrec2" }