[vala] Fix crash with unsupported use of multi-dimensional array length

[Jürg Billeter <juergbi src gnome org>]

commit 609ee9d5a6664d8d8d690b4328b420aa54cc1e48
Author: Jürg Billeter <j bitron ch>
Date:   Sat Dec 19 12:32:56 2009 +0100

    Fix crash with unsupported use of multi-dimensional array length
    
    Fixes bug 604589.

 codegen/valaccodearraymodule.vala        |    2 ++
 codegen/valaccodememberaccessmodule.vala |    3 +++
 2 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valaccodearraymodule.vala b/codegen/valaccodearraymodule.vala
index 45928c1..ec7dd83 100644
--- a/codegen/valaccodearraymodule.vala
+++ b/codegen/valaccodearraymodule.vala
@@ -411,6 +411,8 @@ internal class Vala.CCodeArrayModule : CCodeMethodCallModule {
 			if (lit != null && memberaccess != null) {
 				int dim = lit.value.to_int ();
 				expr.ccodenode = head.get_array_length_cexpression (memberaccess.inner, dim + 1);
+			} else {
+				Report.error (expr.source_reference, "only integer literals supported as index");
 			}
 		} else if (container_type == string_type.data_type) {
 			// should be moved to a different module
diff --git a/codegen/valaccodememberaccessmodule.vala b/codegen/valaccodememberaccessmodule.vala
index c6d9e2f..9e242d0 100644
--- a/codegen/valaccodememberaccessmodule.vala
+++ b/codegen/valaccodememberaccessmodule.vala
@@ -102,6 +102,9 @@ internal class Vala.CCodeMemberAccessModule : CCodeControlFlowModule {
 				expr.ccodenode = new CCodeIdentifier (m.get_cname ());
 			}
 		} else if (expr.symbol_reference is ArrayLengthField) {
+			if (expr.value_type is ArrayType && !(expr.parent_node is ElementAccess)) {
+				Report.error (expr.source_reference, "unsupported use of length field of multi-dimensional array");
+			}
 			expr.ccodenode = head.get_array_length_cexpression (expr.inner, 1);
 		} else if (expr.symbol_reference is Field) {
 			var f = (Field) expr.symbol_reference;