原因分析:
Cygwin uses persistent shared memory sections, which can on occasion become corrupted. The symptom of this is that some Cygwin programs begin to fail, but other applications are unaffected. Since these shared memory sections are persistent, often a reboot is needed to clear them out before the problem can be resolved.


解决办法:
找到Git的安装目录，在命令行下切到bin目录，使用如下命令

rebase.exe -b 0x50000000 msys-1.0.dll