adjacency-list: fix crash in equals operator

some minor code improvements

refs: #4705

Change-Id: I28805981a88a94c79f699956bb7e62a268d9ba49
diff --git a/.jenkins.d/20-tests.sh b/.jenkins.d/20-tests.sh
index b172b2a..f3208b3 100755
--- a/.jenkins.d/20-tests.sh
+++ b/.jenkins.d/20-tests.sh
@@ -10,6 +10,7 @@
 }
 
 ASAN_OPTIONS="color=always"
+ASAN_OPTIONS+=":detect_leaks=false" #4682
 ASAN_OPTIONS+=":detect_stack_use_after_return=true"
 ASAN_OPTIONS+=":check_initialization_order=true"
 ASAN_OPTIONS+=":strict_init_order=true"