It is a segfault in a binary that is part of the testsuite, not in ClamAV itself: --- snip (unit_tests/test-suite.log) --- 99%: Checks: 988, Failures: 1, Errors: 1 check_bytecode.c:127:F:arithmetic:test_inflate_jit:0: cli_bytecode_run failed, expected: 0, have: 28 check_bytecode.c:108:E:arithmetic:test_inflate_int:0: (after this point) Received signal 11 (Segmentation fault) --- snap --- I tried to debug the core dump, but even after installing all debuginfo packages that gdb requested and making sure I have a binary with debug symbols, I don't get any useful (for me) information: --- snip --- Reading symbols from /home/abuild/rpmbuild/BUILD/clamav-0.99.2/unit_tests/.libs/check_clamav...done. [New LWP 30499] [New LWP 30500] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Core was generated by `/home/abuild/rpmbuild/BUILD/clamav-0.99.2/unit_tests/.libs/check_clamav'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f8f0fc8d13d in ?? () [Current thread is 1 (Thread 0x7f8f137f6b80 (LWP 30499))] (gdb) bt #0 0x00007f8f0fc8d13d in ?? () #1 0x00007ffff7f4faf0 in ?? () #2 0x0000000000000000 in ?? () (gdb) thread 2 [Switching to thread 2 (Thread 0x7f8f0fc8c700 (LWP 30500))] #0 clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:80 80 ../sysdeps/unix/sysv/linux/x86_64/clone.S: No such file or directory. (gdb) bt #0 clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:80 #1 0x00007f8f123e8410 in ?? () at pthread_create.c:353 from /lib64/libpthread.so.0 #2 0x00007f8f0fc8c700 in ?? () #3 0x0000000000000000 in ?? () --- snap ---