Failed on Nexus 4/Android 4.4.2

[yongce]

...
>> Running test (19/600)...
2014年 10月 29日 星期三 19:23:58 CST
4543 KB/s (937392 bytes in 0.201s)
Starting: Intent { cmp=me.ycdev.android.demo.appuninstalltest/.MainActivity (has extras) }
++ Sleeping...20 seconds
>> Running test (20/600)...
2014年 10月 29日 星期三 19:24:24 CST
4595 KB/s (937392 bytes in 0.199s)
Starting: Intent { cmp=me.ycdev.android.demo.appuninstalltest/.MainActivity (has extras) }
++ Sleeping...20 seconds
>> Running test (21/600)...
2014年 10月 29日 星期三 19:24:49 CST
4720 KB/s (937392 bytes in 0.193s)
Failure [INSTALL_FAILED_UID_CHANGED]
++ Failed to install app. Please check the reason.
[PWD: ~/work/tyc/demos/AppUninstallTest]  (master)
$ adb shell
shell@mako:/ $ su
root@mako:/ # cd /data/data/
root@mako:/data/data # ll me.ycdev.android.demo.appuninstalltest
drwxrwx--x u0_a3136 u0_a3136          2014-10-29 07:24 shared_prefs
root@mako:/data/data # ll me.ycdev.android.demo.appuninstalltest/sha*
-rw------- u0_a3136 u0_a3136      106 2014-10-29 07:24 test_0.xml
root@mako:/data/data #