Decoder crash for ParamMC at 48kbps FER mono/stereo decoding at 32 and 48 kHz in ivas_ls_setup_conversion_process_mdct_param_mc_fx()

Basic info

• Float reference:
  • Encoder (float): ceb8871f
  • Decoder (float):
• Fixed point:
  • Encoder (fixed): d74de338
  • Decoder (fixed):

Bug description

The fixed point decoder crashes with an assert:

Assertion failed: (0), function L_add, file basop32.c, line 1661.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1436

./IVAS_cod_flt_ref -mc 5_1 -max_band FB 48000 48 am2aa1s09_48.10dB.wav bit
eid-xor -vbr -fer bit 5_1.am2aa1s09_ep.192 bit_err
./IVAS_dec_fx stereo 48 bit_err out.wav