AddressSanitizer memcpy-param-overlap errors with std::string with visual studio 2019

Question

I'm using address sanitizer (ASAN) with visual studio 2019 (version 16.9.2) on windows.
ASAN is reporting lots of errors and almost all of them are memcpy-param-overlap.
They are related usage of std::string.

==13388==ERROR: AddressSanitizer: memcpy-param-overlap: memory ranges [0x2141a3ba,0x2141a3cb) and [0x2141a3b0, 0x2141a3c1) overlap  
    #1 0x16d3e32 in std::basic_string<char,std::char_traits<char>,std::allocator<char> >::insert C:\VS2019\VC\Tools\MSVC\14.25.28610\include\xstring:3006  
    #2 0x16ae413 in std::operator+<char,std::char_traits<char>,std::allocator<char> > C:\VS2019\VC\Tools\MSVC\14.25.28610\include\xstring:4346  

Here is another instance

==13388==ERROR: AddressSanitizer: memcpy-param-overlap: memory ranges [0x214239ba,0x214239cb) and [0x214239b0, 0x214239c1) overlap  
    #1 0x16d3e32 in std::basic_string<char,std::char_traits<char>,std::allocator<char> >::insert C:\VS2019\VC\Tools\MSVC\14.25.28610\include\xstring:3006  
    #2 0x16ae413 in std::operator+<char,std::char_traits<char>,std::allocator<char> > C:\VS2019\VC\Tools\MSVC\14.25.28610\include\xstring:4346  

There are lots of these and all the errors are similar to above.
I don't know what I'm missing here. Is this related to std libraries.
Any hints/direction would be helpful.

Answer 1

Hi @Pradeep K,

This document mentions the error you encountered, I suggest you refer to the solution in it.

Best regards,

Elya

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