I made an Openwrt 12.09 image in Sep 22, 2016, It was fine.
In Nov 3 2016, I introduced "easycwmp" and some related packages into menuconfig, then a booting info
"Nov 4 04:11:09 crond[547]: crond: crond (busybox 1.19.4) started, log level 5"
occurred and later booting are stuck.
So I tried to remove all of newly-added "easycwmp" and some related packages in menuconfig, but the unusual booting info still occurred and later booting are stuck.
Then I checked \openwrt\.config, \openwrt\build_dir\linux-ar71xx_generic\linux-3.3.8\.config,\openwrt-all\target\linux\ar71xx\config-3.3, and deselected all newly-added packages/libs/modules after Sep 22, 2016, but the unusual booting info still occurred and later booting are stuck.
Finally I replaced the 3 files of \openwrt\.config, \openwrt\build_dir\linux-ar71xx_generic\linux-3.3.8\.config,\openwrt-all\target\linux\ar71xx\config-3.3 with previous version (before Sep 22, 2016), but the unusual booting info still occurred and later booting are stuck.
Now my Openwrt 12.09 image in Sep 22, 2016 is unrecoverable! what is going wrong?