CSimpleString::SetLength() Exception in Visual C++ Windows Service

Question

I am trying to find the root cause of an COleException being thrown by my service in production environment. I have checked the crash dump file, and the exception is thrown when trying to construct a string.

COleException is thrown inside void SetLength(_In_ int nLength):

void SetLength(_In_ int nLength)
{
    ATLASSERT( nLength >= 0 );
    ATLASSERT( nLength <= GetData()->nAllocLength );

    if( nLength < 0 || nLength > GetData()->nAllocLength)
        AtlThrow(E_INVALIDARG); // EXCEPTION THROWN HERE BECAUSE GetData()->nAllocLength IS 0 WHILE nLength IS 38

    GetData()->nDataLength = nLength;
    m_pszData[nLength] = 0;
}

Since this is deep inside Microsoft's code (atlsimpstr.h) I'm not certain what is happening. Just wondering if anyone has experienced CString behaving like this?

Call stack:

• ATL::CSimpleString::SetLength()
• ATL::CSimpleString::ReleaseBufferSelLength()
• ATL::CString::FormatV()
• ATL::CString::Format()
• ActiveSocket->ErrorText.Format("Socket %d failed during read?. Error %s", ActiveSocket->Handle, (LPCSTR)Socket::SockErrorAsPrintable(ActiveSocket->Handle));

ActiveSocket->ErrorText is of type CString.

I am using Windows SDK 10.0, v142 Platform Toolset and C++ Language Standard is set to ISO C++14 Standard.