eclipse egit 报错 The current branch is not configured for pull No value for key branch.master

eclipse egit 插件 pull报错 The current branch is not configured for pull No value for key branch.master

原因是缺少merge结构配置

配置文件  红色部分为缺少部分

[core]
    repositoryformatversion = 0
    filemode = false
    logallrefupdates = true
    autocrlf = false
[remote "dev"]
    url = https://github.com/signheart/dev.git
    fetch = +refs/heads/*:refs/remotes/dev/*
[branch "master"]
    remote = dev
    merge = refs/heads/master