1 files changed, 9 insertions, 1 deletions

diff --git a/linden/indra/newview/llpatchvertexarray.cpp b/linden/indra/newview/llpatchvertexarray.cpp
index bfd4ff4..611ff97 100644
--- a/linden/indra/newview/llpatchvertexarray.cpp
+++ b/linden/indra/newview/llpatchvertexarray.cpp
@@ -126,8 +126,16 @@ void LLPatchVertexArray::create(U32 surface_width, U32 patch_width, F32 meters_p
                 mRenderStridep = new U32 [mPatchOrder + 1];
         }
 
+        if (NULL == mRenderLevelp || NULL == mRenderStridep)
+        {
+                // init() and some other things all want to deref these
+                // pointers, so this is serious.
+                llerrs << "mRenderLevelp or mRenderStridep was NULL; we'd crash soon." << llendl;
+                return;
+        }
 
-        // Now that we've allocated memory, we can initialize the arrays...
+        // Now that we've allocated memory, we can initialize
+        // the arrays...
         init();
 }