Hi, Palmer. I saw your patch showed there are a lot of run time fail (execution fail) of C++. bug-*.C These tests are RVV api intrinsics tests coming from Kito's that I have already fixed all of them. I just double checked again they all passed. I think it may be your regression environment does not set up simulator (QEMU or SPIKE or GEM5) correctly. For example, did not enable vector extension in simulator, I don't you may try. Thanks. juzhe.zhong@rivai.ai