whenever i try to do any operation on the 2d vector like .size() this error appears, i just don't know cause every thing is fine on my compiler (i used the same function provided here)
UndefinedBehaviorSanitizer:DEADLYSIGNAL
==1==ERROR: UndefinedBehaviorSanitizer: SEGV on unknown address 0xfffffffffffffffc (pc 0x000000425576 bp 0x000000000004 sp 0x7fff0e55f210 T1)
==1==The signal is caused by a READ memory access.
==1==WARNING: invalid path to external symbolizer!
==1==WARNING: Failed to use and restart external symbolizer!
#0 0x425575 (/workspace/test+0x425575)
#1 0x428826 (/workspace/test+0x428826)
#2 0x42696e (/workspace/test+0x42696e)
#3 0x4264f8 (/workspace/test+0x4264f8)
#4 0x4260cb (/workspace/test+0x4260cb)
#5 0x42be15 (/workspace/test+0x42be15)
#6 0x4257ed (/workspace/test+0x4257ed)
#7 0x7f14d85a0b96 (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
#8 0x404489 (/workspace/test+0x404489)

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

There's an issue with C++ empty matrix test
the compiler isn't detecting this case
if(snail_map[0].size()==0)
return ans;
where ans is an empty vector
My code is working on visual studio on empty matrix or any matrix