Encoder crash for OSBA ISM3SBA1 at 13.2 and 16.4 kbps in gauss_L2_ivas_fx()

Basic info

• Float reference:
  • Encoder (float):
  • Decoder (float):
• Fixed point:
  • Encoder (fixed): ca5e99f0
  • Decoder (fixed):

Bug description

The fixed point encoder crashes with an assert:

Assertion failed: (0), function L_add, file basop32.c, line 1784.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1167

./IVAS_cod_fx -ism_sba 3 1 ISM3SBA1_3_female_noOverlap.0.csv ISM3SBA1_3_female_noOverlap.1.csv ISM3SBA1_3_female_noOverlap.2.csv -max_band WB 13200 16 ISM3SBA1_3_female_noOverlap_16.wav

./IVAS_cod_fx -ism_sba 3 1 ISM3SBA1_3_female_noOverlap.0.csv ISM3SBA1_3_female_noOverlap.1.csv ISM3SBA1_3_female_noOverlap.2.csv -max_band WB 16400 16 ISM3SBA1_3_female_noOverlap_16.wav

This crash also occurs for both bitrate at sampling rates of 32kHz and 48kHz with ±10dB gain on the input file. All input versions have been uploaded, metadata files remain the same regardless of input file.