The jdk build for valhalla is failing with this compilation error. git revert de62c5dcb1875739d776d1c93fb292e2115169c1 is a local workaround.

open/test/micro/org/openjdk/bench/jdk/internal/jrtfs/ImageReaderBenchmark.java:25: error: package jdk.internal.jimage is not visible
import jdk.internal.jimage.ImageReader;
                   ^
  (package jdk.internal.jimage is declared in module java.base, which does not export it to the unnamed module)