[vala/emit-let: 1/4] codegen: Guard access to array length of TargetValue

[Luca Bruno <lucabru src gnome org>]

commit 74902bfb8ed75f5df508c612140ef1436ac08583
Author: Luca Bruno <lucabru src gnome org>
Date:   Thu Jan 20 00:31:41 2011 +0100

    codegen: Guard access to array length of TargetValue

 codegen/valaccodebasemodule.vala |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 00b1f40..8c72aa7 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -2886,7 +2886,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
 				ccall.add_argument (new CCodeConstant ("TRUE"));
 			} else if (type is ArrayType) {
 				var array_type = (ArrayType) type;
-				if (requires_destroy (array_type.element_type)) {
+				if (requires_destroy (array_type.element_type) && has_array_length (value)) {
 					CCodeExpression csizeexpr = null;
 					bool first = true;
 					for (int dim = 1; dim <= array_type.rank; dim++) {
@@ -4329,7 +4329,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
 			set_cvalue (expr, new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_cvalue (expr.inner)));
 
 			var array_type = expr.value_type as ArrayType;
-			if (array_type != null) {
+			if (array_type != null && has_array_length (expr.inner.target_value)) {
 				for (int dim = 1; dim <= array_type.rank; dim++) {
 					append_array_length (expr, new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_array_length_cexpression (expr.inner, dim)));
 				}
@@ -5838,6 +5838,10 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
 		}
 		return glib_value.array_length_cvalues;
 	}
+
+	public bool has_array_length (TargetValue value) {
+		return value != null && ((GLibValue) value).array_length_cvalues != null;
+	}
 }
 
 public class Vala.GLibValue : TargetValue {