Decoder segfault for Stereo at 24.4kbps in ivas_fec_noise_filling_fx()

Basic info

• Float reference:
  • Encoder (float): e15ad0ad
  • Decoder (float):
• Fixed point:
  • Encoder (fixed):
  • Decoder (fixed): d4fd91a6

Bug description

The decoder crashes with a segfault:

shr calls shr_o with Overflow set to NULL eventually causing a null pointer dereference in shl_o.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1344

./IVAS_cod_flt_ref -stereo -max_band FB 24400 48 am1aa1s12_48.10dB.wav bit
 eid-xor -vbr -fer bit stereo-mixed-music.am1aa1s12_ep.192 bit_err

# mono/stereo decoded to 32/48
./IVAS_dec_fx mono 32 bit_err out.wav
./IVAS_dec_fx stereo 48 bit_err out.wav