$ java -XX:+ExecuteInternalVMTests -XX:+UseG1GC -version

The test fails on this assert in HeapRegion::hr_clear():

assert(_end == orig_end(),

The reason for the failure is that the internal test, FreeRegionList_test() in heapRegionSet.cpp, creates heap regions with invalid memory regions. There is this comment in the test:


  // Create a fake heap. It does not need to be valid, as the HeapRegion constructor
  // does not access it.
  MemRegion heap(NULL, num_regions_in_test * HeapRegion::GrainWords);

The problem is that this is no longer true. The assert in HeapRegion::hr_clear() actually looks at the memory region.

So, my (Bengt) guess is that the fix is to create more consistent memory regions in the test.