My application crashed for no reason (0/0 error 0x000000000041B299)

Thank You

Just one minutes ago the application was running fine
It has connection to CPANEL mysql database , use limereport , smtp

I got the error in mysql database
saying "some errors have been detected on the server please look at the bottom of this window in "cpanel"

Now I deleted the database and recreated it
This error was not shown
When I run this application in offline mode (plugging out wifi)
It runs succesfully although it cannot connect to database

I guess this is error with database or is it problem with my code??
16:27:00: The program has unexpectedly finished.
16:27:00: The process was ended forcefully.
myapp.exe crashed

Again if I connect the wifi in middle of running aplication
The application again crashes

And now it even crashes while offline

I got this error once 0x000000000041B299

It may be my application error,
What could have caused it???

Thank You

@Thank-You
Thanks Thanks Thanks to our god
Brian Crains
i got the concept from his video
Oh man
Really very frustrated because of this thing man
Thank you guys so much ❤💛💜🧡❤❤❤❤

It was because of database as well as because of my code

i fetched datas from database Till that it is fine.
Now Suppose I use the data without validation (0)
then it causes this problem

Like I got 0,0,0,0,0,,0,0 from database
I wanted to convert it to percentage

So used 0+0+0+0+0+0+0 = 0
And
now converting to percent without seeing
which results
= 0/0

So it crashed my application

Thank you Thank You

VRonin

Run a debugger. see where it crashes in the code

Thank You

@VRonin
Yes I found it
The database is the problem

In client device it was working properly and now it is not working
So There can't be code problem

Do you know about the database problem

Thank You

@Thank-You

No!!!!
After seeing couple of hours there is no problem in database

CAN smtp connection cause this problem??
I used this code
https://github.com/xcoder123/SimpleSmtp_SSL_QT5

mrjj

@Thank-You
Well all code can crash so yes can be in the SimpleSmtp_SSL_QT5 but
then the debugger should stop on one of its lines when trying to use it. like sending email.

SGaist

Hi,

Are your crash happening only in offline mode ?
Which version of Qt are you using ?

VRonin

@Thank-You said in My application crashed for no reason:

I used this code
https://github.com/xcoder123/SimpleSmtp_SSL_QT5

That code has not been maintained for 7 years. I'd suggest switching to https://github.com/cutelyst/simple-mail

CAN smtp connection cause this problem??

Let the debugger run. when it crashes it will show you what line caused the problem

Thank You

@SGaist
No sir
It works fine in offline mode ( Atleast it shows that database is not connected or ......)
I am using 5.12.8 version of QT

day before yesterday I compiled the project and gave it to client (version with smtp)
It was working fine there
Now , it is not working there too
And The version without smtp is working fine( it contains database)
So I am preety sure that database is not the problem

Although I will try to debug the application
It would be easier for me if I know what line have caused the error

0x000000000041B299 I tried searching it but couldn't find any result on this error
Please see this error
It says the 0/0 is undefined (which I don't have in code)
May be database divided by zero Is it the problem??
https://stackoverflow.com/questions/861778/how-to-avoid-the-divide-by-zero-error-in-sql
From the errror 0/0 I guess it is. Can you guys think of it??
Next time I compile it this error is gone and the program crashes

Thank You

@VRonin
I switched to previous version of my code (it does not have smtp )
But still the program is crashing?

Thank You