There are a couple of jtreg tests, especially in the HS area, with very special assumptions about memory layout/sizes .
Those fail when the address sanitizer is configured ( --enable-asan ).
In the HS :tier1 area on Linux x86_64 we are speaking about ~ 20 out of ~ 3000 tests, so it is not a huge number.
We should find a way to tag those tests (e.g. with a jtreg test keyword or something similar) so that they can be avoided easily when running jtreg tests with ASAN enabled.
Adjusting the tests for "pleasing" the sanitizer is not always desired (if possible for some tests it can be done later) .