C++: Add failing test.

Author: MathiasVP

cpp/ql/test/library-tests/dataflow/dataflow-tests/dataflow-consistency.expected

@@ -3,6 +3,9 @@ uniqueEnclosingCallable
 | test.cpp:864:47:864:54 | call to source | Node should have one enclosing callable but has 0. |
 | test.cpp:872:46:872:51 | call to source | Node should have one enclosing callable but has 0. |
 | test.cpp:872:53:872:56 | 1 | Node should have one enclosing callable but has 0. |
+| test.cpp:1126:33:1129:1 | {...} | Node should have one enclosing callable but has 0. |
+| test.cpp:1127:3:1127:13 | reads_input | Node should have one enclosing callable but has 0. |
+| test.cpp:1128:3:1128:21 | not_does_read_input | Node should have one enclosing callable but has 0. |
 uniqueCallEnclosingCallable
 | test.cpp:864:47:864:54 | call to source | Call should have one enclosing callable but has 0. |
 | test.cpp:872:46:872:51 | call to source | Call should have one enclosing callable but has 0. |

cpp/ql/test/library-tests/dataflow/dataflow-tests/test.cpp

@@ -1115,4 +1115,20 @@ void indirect_sink_const_ref(const T&);
 
 void test_temp_with_conversion_from_materialization() {
   indirect_sink_const_ref(source()); // $ ir MISSING: ast
+}
+
+void reads_input(int x) {
+  sink(x); // $ MISSING: ast,ir
+}
+
+void not_does_read_input(int x);
+
+void (*dispatch_table[])(int) = {
+  reads_input,
+  not_does_read_input
+};
+
+void test_dispatch_table(int i) {
+  int x = source();
+  dispatch_table[i](x);
 }