TestBufferOverrun: Added a test case that shouldn't generate error. Get address beyond array.

testbufferoverrun.cpp

@@ -1,4 +1,4 @@
-/*
+/*
  * c++check - c/c++ syntax checking
  * Copyright (C) 2007 Daniel Marjamäki
  *
@@ -62,6 +62,9 @@ private:
         TEST_CASE( noerr2 );
         TEST_CASE( noerr3 );
 
+        // Todo: Fix this.
+        //TEST_CASE( noerr4 );
+
         TEST_CASE( array_index_1 );
         TEST_CASE( array_index_2 );
         TEST_CASE( array_index_3 );
@@ -131,6 +134,18 @@ private:
     }
 
 
+    void noerr4()
+    {
+        // The memory isn't read or written and therefore there is no error.
+        check( "static void f()\n"
+               "{\n"
+               "    char data[100];\n"
+               "    const char *p = &data[100];\n"
+               "}\n" );
+        ASSERT_EQUALS( std::string(""), errout.str() );
+    }
+
+
     void array_index_1()
     {
         check("void f()\n"