Zhongqiu Zhao

Additional error info: ```erlang [{typechecker,update_map_type, [{type,0,union,[{var,0,'AccOut'},{var,0,'Init'}]}, [{type,0,map_field_assoc, [{var,0,'Key'}, {user_type,[{file,"myapp_utils.erl"},{location,0}], maybe, [{type,0,binary,[]}]}]}]], [{file,".../_build/default/plugins/gradualizer/src/typechecker.erl"}, {line,2858}]}, ``` BTW, the `exclude` option did not work neither: ```erlang {gradualizer_opts, [ {exclude, ["path/to/myapp_utils.erl"]} ]}. ```

``` A / \ B C 1.2 (optional) | C 1.1 ``` In this case, if A is the current project, C 1.2 will always be included. But if it...

BTW, rebar3 hasn't support `and`/`or` in version string, e.g `~> 2.0 or ~> 3.0` which would be another issue. #2364 #2370 #2455 #2486

Oh, I see. Rebar3 only fetch and download dependencies in a level-order traversal (breadth-first fashion?), instead of following the strict semantic versioning. Take semver aside, the behaviour of `optional` of...

> https://hex.pm/docs/mirrors 看起来 upyun 已经搭建了一个 mirror？ 是的，UPYUN 的镜像地址在 hex 官网也列出来了。尽管 UPYUN 的镜像现在还能用，但已经没有人在维护了（内部确认），将来随时可能下线，建议中科大开通一下。 > 谢谢，我确认一下。因为曾经有段时间它不能正常工作了，现在我再确认一下再回复您。 > […](#) 不能工作是因为 rebar3 的工具的更新，并不是因为 UPYUN 镜像本身。（见 [rebar3#2579](https://github.com/erlang/rebar3/pull/2579)）

@iBug cc @guiyanzhong @skyzh

All right. It seems jsDelivr works fine in China. [Ref](https://www.jsdelivr.com/network#china)

> So the solution might be to have a configuration setting for how many connections to open per subchannel. +1 any progress?

Yes, I saw that's what this API was designed for. But need some method to handle this. > drop new no-ack requests if buffer is full (can’t drop old because...

I am interested in this thinking. A typical scenario is that loading from a backend key-value config service and needs to be merged to the 'layered' local configs. My previous...