Decoder crash for Stereo at 32 kbps FER in ivas_cpe_dec_fx()

Basic info

• Float reference:
  • Encoder (float): f2eb9e08
  • Decoder (float):
• Fixed point:
  • Encoder (fixed):
  • Decoder (fixed): 28058dce

Bug description

The fixed point decoder crashes with an assert:

Assertion failed: (0), function L_shl, file basop32.c, line 2334.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1385

./IVAS_cod_flt_ref -stereo -max_band FB 32000 48 ap03a3s02_48.10dB.wav bit
eid-xor -vbr -fer bit stereo-mixed-music.ap03a3s02_ep.192 bit_err
./IVAS_dec_fx stereo 16 bit_err out.wav
# crash also occurs for mono decoding to 16kHz, or stereo decoding to 32 and 48kHz