https://twitter.com/2btc10000pizzas/status/1303768424133398528

No idea what could be going on here :/
{
    CHash256 out_sha;
    FILE* out_file = nullptr;
    if (const char* out_path = getenv("ARGS_MERGE_TEST_OUT")) {
        out_file = fsbridge::fopen(out_path, "w");
        if (!out_file) throw std::system_error(errno, std::generic_category(), "fopen failed");
    }
    ForEachMergeSetup([&](const ActionList& arg_actions, const ActionList& conf_actions, bool soft_set, bool force_set,
                          const std::string& section, const std::string& network, bool net_specific) {
        TestArgsManager parser;
        LOCK(parser.cs_args);
        std::string desc = "net=";