libavcodec/hevc.c:1107: error: Uninitialized Value
  The value read from significant_coeff_flag_idx[_] was never initialized.

libavcodec/hevc.c:1107:13: 
1105.                     first_greater1_coeff_idx = n_idx;
1106.             }
1107.             first_nz_pos_in_cg = significant_coeff_flag_idx[n_end - 1];
                  ^
1108.             sign_hidden        = last_nz_pos_in_cg - first_nz_pos_in_cg >= 4 &&
1109.                                  !lc->cu.cu_transquant_bypass_flag;
