The following csuite tests report memory leak with clang:
wt2323_join_visibility
wt2834_join_bloom_fix
test_wt2853_perf
This is probably after WT-4470 that we have started executing them under address sanitiser.
Reported at:
http://build.wiredtiger.com:8080/job/wiredtiger-clang-sanitizer/3480/