# Basic info <!--- Add commit SHA used to reproduce--> - Fixed point: 24e8bdab048783058e1cbd328e66b0a7935e5153 # Bug description USAN found an out-of-bounds indexing: ``` lib_enc/enc_acelp_fx.c:1000:15: runtime error: index -1 out of bounds for type 'Word16 [256]' #0 0x98adde in E_ACELP_corrmatrix_fx /ivas-basop/lib_enc/enc_acelp_fx.c:1000:15 #1 0x990bf0 in E_ACELP_4tsearch_fx /ivas-basop/lib_enc/enc_acelp_fx.c:1218:5 #2 0x99b9c2 in E_ACELP_4t_fx /ivas-basop/lib_enc/enc_acelp_fx.c:1544:9 #3 0x481630 in inov_encode_ivas_fx /ivas-basop/lib_enc/inov_enc_fx.c:641:25 #4 0x9ae575 in encod_gen_voic_ivas_fx /ivas-basop/lib_enc/enc_gen_voic_fx.c:663:9 #5 0x9511eb in acelp_core_enc_ivas_fx /ivas-basop/lib_enc/acelp_core_enc_fx.c:1379:13 #6 0xa0fc58 in ivas_core_enc_fx /ivas-basop/lib_enc/ivas_core_enc_fx.c:326:13 #7 0xac0fc4 in ivas_cpe_enc_fx /ivas-basop/lib_enc/ivas_cpe_enc_fx.c:1230:5 #8 0x485ea3 in ivas_enc_fx /ivas-basop/lib_enc/ivas_enc_fx.c:182:9 #9 0x43d5a8 in IVAS_ENC_EncodeFrameToSerial /ivas-basop/lib_enc/lib_enc_fx.c:1502:13 #10 0x42cf18 in main /ivas-basop/apps/encoder.c:877:28 #11 0x7fd13c58dd8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16 #12 0x7fd13c58de3f in __libc_start_main csu/../csu/libc-start.c:392:3 #13 0x4045b4 in _start (/ivas-basop/IVAS_cod+0x4045b4) SUMMARY: UndefinedBehaviorSanitizer: out-of-bounds-index lib_enc/enc_acelp_fx.c:1000:15 in ``` It needs to be checked if this is an actual bug or a somewhat "false positive" that is assigned, but never really used. In any case, it is preferable to fix this to have one less noise in the USAN error reports. # Ways to reproduce <!--Commandline or script--> ```bash make clean make -j CLANG=3 IVAS_cod -stereo -dtx 13200 32 scripts/testv/stvST32n.wav bit ``` <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary.-->