Alright, I need to classify this bug report into one of three categories: instruction, syscall, or runtime. Let's break down the information provided. The user is using qemu-aarch64-static to run an arm64v8/openjdk image on an x86 machine. They encountered a hang when using QEMU master version but not with older versions (2.5.0 and 2.11.1). When they tried to reproduce, the container hangs and produces a core dump. The terminal shows a segmentation fault (signal 11), which is a runtime error. Segmentation faults typically occur when a program tries to access invalid memory addresses. The coredump indicates that the issue happens during the execution of the Java compiler (javac). This suggests it's not an instruction-level problem because the code was running but crashed due to incorrect memory access, which is more about runtime behavior than a specific instruction or syscall. So, considering these points, the bug is related to runtime errors. runtime