The following code or similar when run on MacOS AArch64

        VaList vaList = VaList.make(b -> b.addVarg(ValueLayout.JAVA_LONG, 1), MemorySession.openShared());
        vaList.skip(ValueLayout.JAVA_LONG);
        vaList.skip(ValueLayout.JAVA_LONG);
        vaList.skip(ValueLayout.JAVA_LONG);
        vaList.skip(ValueLayout.JAVA_LONG);
        vaList.skip(ValueLayout.JAVA_LONG);

leads to

Exception in thread "main" java.lang.IndexOutOfBoundsException: Out of bound access on segment MemorySegment{ id=0x3a2eb306 limit: 0 }; new offset = 8; new length = 0
at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.outOfBoundException(AbstractMemorySegmentImpl.java:416)
at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.checkBounds(AbstractMemorySegmentImpl.java:400)
at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.asSlice(AbstractMemorySegmentImpl.java:115)
at java.base/jdk.internal.foreign.AbstractMemorySegmentImpl.asSlice(AbstractMemorySegmentImpl.java:67)
at java.base/jdk.internal.foreign.abi.aarch64.macos.MacOsAArch64VaList.skip(MacOsAArch64VaList.java:134)

Specification could deserve clarification - for example mention of IndexOutOfBoundsException

https://download.java.net/java/early_access/jdk19/docs/api/java.base/java/lang/foreign/VaList.html#skip(java.lang.foreign.MemoryLayout...)