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[CLANG18] MSAN: use-of-uninitialized-value in apps/renderer.c:522:26

Basic Info

Bug description

Clang 18 MSAN found an use-of-uninitialized-value error at apps/renderer.c:522:26:

==19377==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55b76a8b001d in floatToFixed_arrL_app /builds/rep/sa4/audio/ivas-basop/apps/renderer.c:522:26
#1 0x55b76a89e475 in main /builds/rep/sa4/audio/ivas-basop/apps/renderer.c:1364:13
#2 0x7f237cd5f1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#3 0x7f237cd5f28a in __libc_start_main csu/../csu/libc-start.c:360:3
#4 0x55b76a7fe3e4 in _start (/builds/rep/sa4/audio/ivas-basop/IVAS_rend+0x3a3e4) (BuildId: 95a4b3e2a14753d995ecbd30d0f4bf3185fc019d)

SUMMARY: MemorySanitizer: use-of-uninitialized-value /builds/rep/sa4/audio/ivas-basop/apps/renderer.c:522:26 in floatToFixed_arrL_app

How to reproduce

⚠️ Make sure to use CLANG v18 for building the codec :warning

Build with

make clean
make -j CLANG=1

Then run

E subprocess.CalledProcessError: Command '['/builds/rep/sa4/audio/ivas-basop/IVAS_rend', '-i', '/builds/rep/sa4/audio/ivas-basop/scripts/testv/spectral_test_12ch_48kHz.wav', '-if', '/builds/rep/sa4/audio/ivas-basop/scripts/ls_layouts/t_design_4.txt', '-o', '/builds/rep/sa4/audio/ivas-basop/tests/renderer_short/cut/t_design_4_to_MONONone_20msNone_48kHz.wav', '-of', 'MONO', '-fs', '48', '-no_delay_cmp', '-q', '-fr', '20']' returned non-zero exit status 1.

or

python3 -m pytest "test_custom_ls_input[48kHz-20ms-t_design_4-MONO]" -n auto --update_ref --ref_encoder_path ./IVAS_cod --ref_decoder_path ./IVAS_dec