xml.transform fails with validation errors early in a base run. The jdk used is from jdk9/hs-comp -r b485e734ff2a and reproduces the issue. I also checked an earlier jdk which does not have the issue. That jdk is jdk9/hs-comp -r 257396cd1763. My jdks were built on windows and linux (for skx). The problem reproduces on both 64-bit targets.