HPCC-11243 Correctly catch invalid (blank) module names

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>

ecl/hql/hqlrepository.cpp

@@ -103,6 +103,10 @@ IHqlExpression * getResolveAttributeFullPath(const char * attrname, unsigned loo
             moduleName = createIdAtom(item);
         }
 
+        //Check for empty module name
+        if (!moduleName)
+            return NULL;
+
         OwnedHqlExpr resolved;
         if (parentScope)
         {

ecl/regress/issue11243.eclxml

@@ -0,0 +1,27 @@
+<Archive useArchivePlugins="1">
+<!--
+
+    HPCC SYSTEMS software Copyright (C) 2012 HPCC Systems.
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+ <Module name="myModule">
+  <Attribute name="applyLimits">
+r := { unsigned id := 0; };
+export applyLimits := normalize(dataset(row(r)), 1000, transform(r, self.id := counter));
+  </Attribute>
+ </Module>
+ <Option name="applyInstantEclTransformations" value="1"/>
+ <Option name="applyInstantEclTransformationsLimit" value="123"/>
+ <Query attributePath=".applyLimits"/>
+</Archive>