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BASOP decoder asserts in ivas_dirac_dec_binaural_determine_processing_matrices_fx with OMASA BASOP encoder bitstream using rate switching

Basic info

Bug description

One more crash in the same place with another combination. Only happens with BASOP ENC to BASOP DEC.

Stack trace

Screenshot_2025-04-28_at_11.03.41

Ways to reproduce

Following command line with this rate switching pattern omasa_4obj_techs_start_384k_20frames.bin

IVAS_cod -ism_masa 4 2 ltv48_OMASA_4ISM_2TC_ISM1.csv ltv48_OMASA_4ISM_2TC_ISM2.csv ltv48_OMASA_4ISM_2TC_ISM3.csv ltv48_OMASA_4ISM_2TC_ISM4.csv ltv48_OMASA_4ISM_2TC.met -max_band fb  omasa_4obj_techs_start_384k_20frames.bin 48 ltv48_OMASA_4ISM_2TC.wav test_0840.bs
IVAS_dec BINAURAL_ROOM_IR 48 test_0840.bs 0840_ltv48_OMASA_4ISM_2TC.wav_omasa_4obj_techs_start_384k_20frames_48-48___BINAURAL_ROOM_IR.wav