The following test failed in the 2017-07-21 JDK10-hs nightly:

compiler/ciReplay/TestSAServer.java
    Test failed due to "sun.jvm.hotspot.types.WrongTypeException: field
    "_stack_traversal_mark" in type nmethod is not of C integer type, but
    instead of type jlong" on Linux-AArch64 64-bit Server VM, Linux-X64
    64-bit Server VM, Linux-X64 32-bit Server VM, and Solaris SPARCv9
    64-bit Server VM.

    Looks like the _stack_traversal_mark was recently touched by this
    changeset:

    $ hg annot src/share/vm/code/nmethod.hpp | grep 'volatile jlong'
    13298: volatile jlong _stack_traversal_mark;

    $ hg annot src/share/vm/runtime/vmStructs.cpp | grep '_stack_traversal_mark'
    13298: volatile_nonstatic_field(nmethod, _stack_traversal_mark, jlong) \

    $ hg log -r 13298
    changeset: 13298:a3b8c747b6bf
    user: rkennke
    date: Fri Jul 07 12:49:11 2017 +0200
    summary: 8180932: Parallelize safepoint cleanup