UndefinedBehaviorSanitizer:DEADLYSIGNAL
==1==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0x000000000001 (pc 0x000000425760 bp 0x000000000000 sp 0x7ffffced09f0 T1)
==1==The signal is caused by a READ memory access.
==1==Hint: address points to the zero page.
==1==WARNING: invalid path to external symbolizer!
==1==WARNING: Failed to use and restart external symbolizer!
#0 0x42575f (/workspace/test+0x42575f)
#1 0x4282a6 (/workspace/test+0x4282a6)
#2 0x426b6e (/workspace/test+0x426b6e)
#3 0x42659d (/workspace/test+0x42659d)
#4 0x42628b (/workspace/test+0x42628b)
#5 0x42c7a5 (/workspace/test+0x42c7a5)
#6 0x4259cd (/workspace/test+0x4259cd)
#7 0x7fe00d17ec86 (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
#8 0x4046f9 (/workspace/test+0x4046f9)

UndefinedBehaviorSanitizer can not provide additional info.
==1==ABORTING

what is this ;-;