Bangladesh suffered a major setback ahead of their Test series against Australia, losing their warm-up match against a Cricket Australia XI by an innings and 38 runs in Darwin.After making 263 in their first innings, Bangladesh conceded 355 as the Australia XI took a 92-run lead. The visitors then collapsed dramatically in their second innings, being bowled out for just 54 in 21.6 overs.The chief destroyer was 22-year-old left-arm pacer Campbell Thompson, who produced a remarkable spell to finish with 8 wickets for 25 runs in 11 overs.Thompson had already dismissed Sadman Islam and Mominul Haque for six runs each on the previous day. Bangladesh resumed on 19 for 2 and quickly slipped further into trouble.Captain Najmul Hossain Shanto was trapped lbw without scoring before Soumya Sarkar and Mushfiqur Rahim fell for 5 and 2 respectively, all to Thompson.Bangladesh were reduced to 36 for 4 before Tanzid Hasan Tamim offered some resistance with 22. However, Amit Hasan was dismissed for 4 by Corey Rocchiccioli, followed by Mehidy Hasan Miraz as Bangladesh slipped to 45 for 6.Thompson then completed his outstanding performance by removing Taskin Ahmed and Ebadot Hossain, ending Bangladesh's innings at 54.Rocchiccioli claimed the other two wickets for the Australia XI.The heavy defeat will raise fresh concerns over Bangladesh's batting ahead of their two-Test series against Australia. The second-innings collapse, in particular, provides a significant warning for Najmul Hossain Shanto's side before the Test series begins.