We noticed in SERVER-49857 that the debuginfo archive was not being extracted for ASAN builds, leading to the mistaken impression that ASAN symbolization was not happening at all. In fact, it was, but the lack of debug info was preventing line numbers from being shown. Here's an example of a build where the debuginfo archive was downloaded but apparently not extracted:

https://evergreen.mongodb.com/task/mongodb_mongo_master_ubuntu1804_debug_asan_disk_wiredtiger_patch_e8b0acc393d181a50301a10ae436dc580b335858_5f3586d03066156e86056d18_20_08_13_18_30_59##comparehashes=e8b0acc393d181a50301a10ae436dc580b335858&threads=all

Not having debuginfo extracted for sanitizer builds makes finding the causes of sanitizer failures more difficult, so it would help if we could get that to happen in at least these builds.