Not (C='a' or C='b') as well as Not (C='a' and C='b') causes NPE

/*  65 */           public boolean moveNext() {
/*  66 */             while (inputEnumerator.moveNext()) {
/*  67 */               final Object[] current = (Object[]) inputEnumerator.current();
/*  68 */               final String inp21_ = current[21] == null ? (String) null : current[21].toString();
/*  69 */               final Boolean v = inp21_ == null ? (Boolean) null : Boolean.valueOf(org.apache.calcite.runtime.SqlFunctions.eq(inp21_, "A"));
/*  70 */               final Boolean v0 = inp21_ == null ? (Boolean) null : Boolean.valueOf(org.apache.calcite.runtime.SqlFunctions.eq(inp21_, "B"));
/*  71 */               if (!(v == null ? (v0 == null || !v0 ? (Boolean) null : Boolean.TRUE) : v ? Boolean.TRUE : v0)) {
/*  72 */                 return true;
/*  73 */               }
/*  74 */             }
/*  75 */             return false;
/*  76 */           }

Caused by: java.lang.NullPointerException
	at Baz$1$1.moveNext(ANONYMOUS.java:71)
	at org.apache.calcite.linq4j.EnumerableDefaults.groupBy_(EnumerableDefaults.java:737)
	at org.apache.calcite.linq4j.EnumerableDefaults.groupBy(EnumerableDefaults.java:677)
	at org.apache.calcite.linq4j.DefaultEnumerable.groupBy(DefaultEnumerable.java:301)
	at Baz.bind(Baz.java:95)
	at org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:281)
	at org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:235)
	at org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:533)
	at org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:184)
	at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:63)
	at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:42)
	at org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:473)
	at org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:566)
	at org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477)
	at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109)
	... 29 more