thorfei

Attempted to dereference garbage pointer

1

``` 0 libobjc.A.dylib | objc_retain + 16 1 xxx | TMReachabilityCallback (Reachability.m:76) 2 SystemConfiguration | _reachPerformAndUnlock + 540 3 SystemConfiguration | _____SCNetworkReachabilityRestartResolver_block_invoke_2 + 472 4 libnetwork.dylib | ___nw_resolver_update_client_block_invoke + 104...

I use Xcode10.1 + libcurl 7.63.0 make failed, detail log in the attachment. It seems not work well with Xcode10.1 [detail.log](https://github.com/sinofool/build-libcurl-ios/files/2710186/detail.log)