Thanks to Matthias Klose, we just discovered that building Zero with the recent 2.3.4 release is broken (as is the earlier 2.3.3 release). Zero on 2.3.x uses the HotSpot from the 2.1.x tree (which includes the ARM32 assembler port), and, when we backported 7158800 in 2.1.3, we broke the application of 6924259 to this HotSpot in 2.3.3. This changeset, just applied to the 2.3 branch, fixes the issue. It will be included in the eventual 2.3.5 release, but, if you want Zero on 2.3.4 now, you’ll need to apply this patch yourself. Sorry for the inconvenience.