From d739588d4a1c59e2c10c496ecf5703bdd61bba9a Mon Sep 17 00:00:00 2001
From: Alexey Prokhin <alexey.prokhin@yandex.ru>
Date: Sat, 21 Apr 2012 18:24:10 +0400
Subject: [PATCH] Fix dmd bug 7504: Cannot assign an object of type
 'typeof(null)' to an array

---
 gen/llvmhelpers.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/gen/llvmhelpers.cpp b/gen/llvmhelpers.cpp
index 17b7119a..88a9c4f0 100644
--- a/gen/llvmhelpers.cpp
+++ b/gen/llvmhelpers.cpp
@@ -748,6 +748,15 @@ DValue* DtoCastNull(Loc& loc, DValue* val, Type* to)
         LLValue *rval = DtoBitCast(val->getRVal(), tolltype);
         return new DImValue(to, rval);
     }
+    if (totype->ty == Tarray)
+    {
+        if (Logger::enabled())
+            Logger::cout() << "cast null to array: " << *tolltype << '\n';
+        LLValue *rval = val->getRVal();
+        rval = DtoBitCast(rval, DtoType(to->nextOf()->pointerTo()));
+        rval = DtoAggrPair(DtoConstSize_t(0), rval, "null_array");
+        return new DImValue(to, rval);
+    }
     else
     {
         error(loc, "invalid cast from null to '%s'", to->toChars());