Valgrind memory analyzer in Qt Creator finds a problem and then crashes Qt

Guerrian

I am getting a message from the Valgind memory analyzer: "32,816 bytes in 1 blocks are definitely lost..."

The function and line number where this is occurring:

void processDir(string dn)
{
    DIR *dir;
    dirent *pdir;
    vector<string> fls;
    vector<string>::size_type v, sz;
    string str;
    dir = opendir(dn.c_str()); // <- problem reported here
    if (dir == NULL)
        cout << "bad directory" << endl;
    else
    {
        while ((pdir = readdir(dir)) != NULL)
        {
            str = pdir->d_name;
            if (str != "." && str != ".." && str != "README.txt")
                fls.push_back(str);
        }
        sz = fls.size();
        if (sz > MAX_FILES)
        {
            cout << "too many files, limit is " << MAX_FILES << endl;
            return;
        }
        sort(fls.begin(), fls.end());
        for(v = 0; v < sz; v++)
            processFile(dn + "/" + fls[v]);
    }
}

If I click on the message then Qt Creator crashes with no further error message.

Should I be using QString instead of std::string?

I'm using Qt Creator 3.5.1 on Linux Mint 18.3.

aha_1980

@Guerrian said in Valgrind memory analyzer in Qt Creator finds a problem and then crashes Qt:

DIR *dir;

I think this is the problem. Have you tried adding closedir at the end of your function?

Regards

Guerrian

Yeah, adding "closedir(dir)" gets rid of the problem. It makes sense, thanks.