segment fault when compute vmaf use x265

The command is follows: ./x265 --input src.yuv --fps 25.0 --input-res 720x1280 --csv csv.log --crf 18.0 --recon rec.yuv -o dst-src.265

Env: linux system gcc version: gcc.4.8.2

I check the backtrance in gdb: 0x00007ffff6c1e3f7 in raise () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 (gdb) bt #0 0x00007ffff6c1e3f7 in raise () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #1 0x00007ffff6c1f7d8 in abort () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #2 0x00007ffff6c5c554 in __libc_message () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #3 0x00007ffff6c61dbe in malloc_printerr () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #4 0x00007ffff6c64a72 in _int_realloc () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #5 0x00007ffff6c65929 in realloc () from /opt/compiler/gcc-4.8.2/lib/libc.so.6 #6 0x000000000062cb91 in readline (input=0x7fffe1f4b1f0) at /home/scmbuild/workspaces_cluster.debug/baidu.bce-multimedia.mct-ffmpeg-new__GCC_4.8.2.20181101.115208/baidu/bce-multimedia/mct-third64/vmaf/vmaf-1.3.9/wrapper/src/svm.cpp:343 #7 svm_load_model (model_file_name=<optimized out>) at /home/scmbuild/workspaces_cluster.debug/baidu.bce-multimedia.mct-ffmpeg-new__GCC_4.8.2.20181101.115208/baidu/bce-multimedia/mct-third64/vmaf/vmaf-1.3.9/wrapper/src/svm.cpp:536 #8 0x0000000000577d6f in LibsvmNusvrTrainTestModel::_read_and_assert_svm_model (this=this@entry=0x7fffe1f4cd80, libsvm_model_path=<optimized out>) at /home/scmbuild/workspaces_cluster.debug/baidu.bce-multimedia.mct-ffmpeg-new__GCC_4.8.2.20181101.115208/baidu/bce-multimedia/mct-third64/vmaf/vmaf-1.3.9/wrapper/src/vmaf.cpp:155

what is the problem?

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