https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112853
--- Comment #5 from Robin Dapp <rdapp at gcc dot gnu.org> --- Can confirm. The scalable build works with qemu vlen=128 but fails with vlen=256. That's a good data point as I'm not sure we're already covering this with the current runs? I'm going to start a testsuite run with -march=rv64gcv_zvl128b and qemu vlen=256 to look for fallout. Maybe this will already give us a clue before extracting an x264 test case.