if (PrintMiscellaneous && Verbose) {
    char buf[512];
    os::print_cpu_info(tty, buf, sizeof(buf));

512 is not enough:

CPU Model and flags from /proc/cpuinfo:
model name : Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ida arat epb pln pts dtherm hwp hwp_noitfy hwp_act_window hwp_epp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 invpcid rtm rheap address: 0x0000000083600000, size: 1994 MB, Compressed Oops mode: 32-bit