With cc43b322 and this bitstream : [ff_mic12_SbSb002.bit.24400](/uploads/d5721910db909e6508682675da3d0dca/ff_mic12_SbSb002.bit.24400) When decoding the TDBWE, a crash can happen in the function deindex_lvq_SHB_fx()->decode_comb_fx(index, cv, idx_lead) when **index < pi0[idx_lead]**. in the floating point code decode_comb(index, cv, idx_lead) we have this integer division ``` idx_sign = (int16_t) ( index / pi0[idx_lead] ); ``` which gives 0 whenever : - abs(index) < pi0[idx_lead] - OR if index == 0 On the other hand, div_l() doesn't allow for a numerator <= 0 (it actually crashes when that happens) The issue is very similar to what has been raised in #719 This simple modification could solve the problem: ``` #if 1 IF( LT_32( L_shl( index, 1 ), pi0[idx_lead] ) ) { idx_sign = 0; move16(); } ELSE #endif { idx_sign = extract_l( div_l( L_shl( index, 1 ), pi0[idx_lead] ) ); /*(index/pi0_fx[idx_lead]); */ } ``` Tagging @venkateshsa and @vasilache.