Encoder crash for McMASA 5.1 at 16.4kbps in encod_unvoiced_ivas_fx()

Basic info

• Float reference:
  • Encoder (float):
  • Decoder (float):
• Fixed point:
  • Encoder (fixed): d68c8f84
  • Decoder (fixed):

Bug description

The fixed point encoder 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-1221

./IVAS_cod -mc 5_1 -max_band SWB 16400 32 am2aa1s05_32.-10dB.wav bit