build error after JDK-8279366

[2022-10-25T18:04:37,954Z] /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S8385/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/94e60bac-4c32-47f6-a74c-678754acd011/runs/0263fe07-26ce-4e18-8204-28060c6f339c/workspace/open/src/hotspot/share/cds/filemap.cpp: In member function 'bool FileMapInfo::check_paths(int, int, GrowableArray<const char*>*, unsigned int, unsigned int)':
[2022-10-25T18:04:37,954Z] /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S8385/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/94e60bac-4c32-47f6-a74c-678754acd011/runs/0263fe07-26ce-4e18-8204-28060c6f339c/workspace/open/src/hotspot/share/cds/filemap.cpp:898:45: error: operation on 'runtime_path' may be undefined [-Werror=sequence-point]
[2022-10-25T18:04:37,954Z] 898 | const char* runtime_path = runtime_path = rp_array->at(i) + runtime_prefix_len;
[2022-10-25T18:04:37,954Z] | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~