dns_utils: fix infinite recursion when distributing empty dns_urls
load_txt_records_from_dns attempts to distribute `a = 0, b = -1` where (b = dns_urls.size() - 1) and IntType is signed integer. This results in an infinite recursion which leads to SIGSEGV.
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@ -478,6 +478,9 @@ namespace
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bool load_txt_records_from_dns(std::vector<std::string> &good_records, const std::vector<std::string> &dns_urls)
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{
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// Prevent infinite recursion when distributing
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if (dns_urls.empty()) return false;
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std::vector<std::vector<std::string> > records;
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records.resize(dns_urls.size());
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