text: // Test that interrupting a count returns an error code.
  
  t = db.count10;
  t.drop();
  
  for (i = 0; i < 100; i++) {
      t.save({x: i});
  }
  
  // Start a parallel shell which repeatedly checks for a count
  // query using db.currentOp(). As soon as the op is found,
  // kill it via db.killOp().
  s = startParallelShell('assert.soon(function() {' +
                         '   current = db.currentOp({"ns": db.count10.getFullName(), ' +
                         '                           "query.count": db.count10.getName()}); ' +
  
                         // Check that we found the count op. If not, return false so
                         // that assert.soon will retry.
                         '   assert("inprog" in current); ' +
                         '   if (current.inprog.length === 0) { ' +
                         '       jsTest.log("count10.js: did not find count op, retrying"); ' +
                         '       printjson(current); ' +
                         '       return false; ' +
                         '   } ' +
                         '   countOp = current.inprog[0]; ' +
                         '   if (!countOp) { ' +
                         '       jsTest.log("count10.js: did not find count op, retrying"); ' +
                         '       printjson(current); ' +
                         '       return false; ' +
                         '   } ' +
  
                         // Found the count op. Try to kill it.
                         '   jsTest.log("count10.js: found count op:"); ' +
                         '   printjson(current); ' +
                         '   printjson(db.killOp(countOp.opid)); ' +
                         '   return true; ' +
                         '}, "count10.js: could not find count op after retrying, gave up");');
  
  function getKilledCount() {
      try {
          db.count10.find("sleep(1000)").count();
          jsTest.log("count10.js: count op completed without being killed");
      } catch (e) {
          return e;
      }
  }
  
  var res = getKilledCount();
  jsTest.log("count10.js: killed count output start");
  printjson(res);
  jsTest.log("count10.js: killed count output end");
  assert(res);
  assert(res.message.match(/count failed/) !== null);
  assert(res.message.match(/\"code\"/) !== null);
  
  s();
  