FilterCalcMergeRule/ProjectCalcMergeRule should not merge a Filter/Project to Calc when it contains Subquery

@Test void testProjectCalcMergeRule() {
  final String sql = "select exists (select deptno from sales.emp)\n"
      + "from (select deptno from sales.emp where empno < 20)\n";
  HepProgram program = new HepProgramBuilder()
      .addRuleInstance(CoreRules.PROJECT_FILTER_TRANSPOSE)
      .addRuleInstance(CoreRules.FILTER_TO_CALC)
      .build();
  sql(sql)
      .withPre(program)
      .withRule(CoreRules.PROJECT_CALC_MERGE)
      .checkUnchanged();
} 

org.apache.calcite.rex.RexSubQuery cannot be cast to org.apache.calcite.rex.RexLocalRef
java.lang.ClassCastException: org.apache.calcite.rex.RexSubQuery cannot be cast to org.apache.calcite.rex.RexLocalRef
    at org.apache.calcite.rex.RexProgramBuilder.registerInput(RexProgramBuilder.java:301)
    at org.apache.calcite.rex.RexProgramBuilder.addProject(RexProgramBuilder.java:210)
    at org.apache.calcite.rex.RexProgram.create(RexProgram.java:234)
    at org.apache.calcite.rex.RexProgram.create(RexProgram.java:203)
    at org.apache.calcite.rel.rules.ProjectCalcMergeRule.onMatch(ProjectCalcMergeRule.java:77)
    at org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:350)
    at org.apache.calcite.plan.hep.HepPlanner.applyRule(HepPlanner.java:556)
    at org.apache.calcite.plan.hep.HepPlanner.applyRules(HepPlanner.java:420)
    at org.apache.calcite.plan.hep.HepPlanner.executeRuleInstance(HepPlanner.java:243)
    at org.apache.calcite.plan.hep.HepInstruction$RuleInstance$State.execute(HepInstruction.java:178)
    at org.apache.calcite.plan.hep.HepPlanner.lambda$executeProgram$0(HepPlanner.java:211)
    at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:423)
    at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:210)
    at org.apache.calcite.plan.hep.HepProgram$State.execute(HepProgram.java:118)
    at org.apache.calcite.plan.hep.HepPlanner.executeProgram(HepPlanner.java:205)
    at org.apache.calcite.plan.hep.HepPlanner.findBestExp(HepPlanner.java:191)
    at org.apache.calcite.test.RelOptFixture.checkPlanning(RelOptFixture.java:383)
    at org.apache.calcite.test.RelOptFixture.check(RelOptFixture.java:334)
    at org.apache.calcite.test.RelOptFixture.checkUnchanged(RelOptFixture.java:326)
    at org.apache.calcite.test.RelOptRulesTest.testProjectCalcMergeRule(RelOptRulesTest.java:9742)