Cocos2d-x crashes not logged into crash report

I am using crashlytics to show crash report in my cocos2d-x game, But when it crashes, I don’t get any crash report. Please help.
When I run game on android device, whenever it crashes in cpp file, logcat shows no description, it only shows:-

A/libc(16439): Fatal signal 11 (SIGSEGV) at 0x00680074 (code=1), thread 16460 (Thread-13198)

, I want to show complete description, any help?