IOS app crash automatically after start.

[R_ram]

• After the app started and ui shown it waits for 15-20 secs and then it gets crashed with below error

libc++abi.dylib: terminating with uncaught exception of type QString

program received signal 6, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:03000000;04:06000000;05:dcc9103b;06:40880f3b;07:88933403;08:50146118;09:6f662074;0a:74700f3b;0b:708fea14;0c:48010000;0d:7c933403;0e:130da338;0f:fc0d9b38;10:10000000;metype:5;mecount:2;medata:10003;medata:6;
program received signal 6, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:ffffffff;04:06000000;05:dcc9103b;06:40880f3b;07:68933403;08:50146118;09:79b0a238;0a:74700f3b;0b:708fea14;0c:48010000;0d:5c933403;0e:130da338;0f:fc0d9b38;10:10000000;metype:5;mecount:2;medata:10003;medata:6;
program received signal 5, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:01000000;04:78933403;05:ffffffff;06:40880f3b;07:88933403;08:50146118;09:79b0a238;0a:74700f3b;0b:708fea14;0c:30000000;0d:70933403;0e:ab099538;0f:aa099538;10:30000040;metype:6;mecount:2;medata:1;medata:defe;
program received signal 5, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:01000000;04:78933403;05:ffffffff;06:40880f3b;07:88933403;08:50146118;09:79b0a238;0a:74700f3b;0b:708fea14;0c:30000000;0d:70933403;0e:ab099538;0f:aa099538;10:30000040;metype:6;mecount:2;medata:1;medata:defe;
program received signal 5, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:01000000;04:78933403;05:ffffffff;06:40880f3b;07:88933403;08:50146118;09:79b0a238;0a:74700f3b;0b:708fea14;0c:30000000;0d:70933403;0e:ab099538;0f:aa099538;10:30000040;metype:6;mecount:2;medata:1;medata:defe;
program received signal 5, thread:1351dd;qaddr:3b10cad0;00:00000000;01:00000000;02:00000000;03:01000000;04:78933403;05:ffffffff;06:40880f3b;07:88933403;08:50146118;09:79b0a238;0a:74700f3b;0b:708fea14;0c:30000000;0d:70933403;0e:ab099538;0f:aa099538;10:30000040;metype:6;mecount:2;medata:1;medata:defe;
hit maximum number of consecutive signals, stopping
Run ended.

• My app has some functions which write log files. Does that cause any problem?

Now i'm using mac version 10.12.2, Xcode version-8.2.1, ios sdk version- 10.2, Qt version-5.8.0beta

Previously i run the same app using Qt5.6.0 but i run perfectly now facing some problem can't able to catch the root cause.

Thank you.

[SGaist]

Hi,

You should update Qt, 5.8.0 has been officially released.

[R_ram]

Thank you for your reply..

I download Qt5.8.0 but facing same issue with that also .

Is there any possible way to know why that happens?

[SGaist]

You would need to start your application with the debugger to get more informations about where it happens.

[R_ram]

Hi,

I run in debug mode only so that i catched the above error.
Does the latest xcode sdk supports to write some logs?
Because we are doing that in our application.

Thank you

[SGaist]

Are you doing any index based manipulation of your QString objects ? The error might indicate an index error.