Upstream: consistently initialize explicit upstreams. When an upstream{} block follows a proxy_pass reference to it, such an upstream inherited port and default_port settings from proxy_pass. This was different from when they came in another order (see ticket #1059). Explicit upstreams should not have port and default_port in any case. This fixes the following case: server { location / { proxy_pass http://u; } ... } upstream u { server 127.0.0.1; } server { location / { proxy_pass https://u; } ... } but not the following: server { location / { proxy_pass http://u; } ... } server { location / { proxy_pass https://u; } ... } upstream u { server 127.0.0.1; }

/*
 * Copyright (C) Maxim Dounin
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


#if (NGX_HAVE_DLOPEN)

char *
ngx_dlerror(void)
{
    char  *err;

    err = (char *) dlerror();

    if (err == NULL) {
        return "";
    }

    return err;
}

#endif