with c7b43a06 and this bitstream : [P800-3-c1d_-stereo_16400_48.zip](/uploads/4e5e241e64ce58e4a88b0b8417d94f1c/P800-3-c1d_-stereo_16400_48.zip) the decoder crashes at frame 2877 in the function ivas_wb_tbe_dec_fx() (Ln972 of swb_tbe_dec_fx.c) ``` Lscale = root_a_over_b_fx( curr_pow, shl_r( Q_bwe_exc_ext, 1 ), prev_pow, shl_r( sub( st_fx->prev_Q_bwe_exc, 16 ), 1 ), &exp ); FOR( i = 0; i < L_SHB_LAHEAD / 4 - 1; i++ ) { L_tmp = Mult_32_16( Lscale, shaped_wb_excitation[i] ); /* Q(16-exp+Q_bwe_exc_ext) */ -->> shaped_wb_excitation[i] = round_fx( L_shl( L_tmp, exp ) ); /* Q_bwe_exc_ext */ move16(); } ``` Using saturation for the L_shl and rounding solves it, but to me it seems a bit strange given the signal amplitude at that frame is around ± 16, so very low