Our website uses cookies to enhance your browsing experience.
Accept
to the top
close form

Fill out the form in 2 simple steps below:

Your contact information:

Step 1
Congratulations! This is your promo code!

Desired license type:

Step 2
Team license
Enterprise license
** By clicking this button you agree to our Privacy Policy statement
close form
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
* By clicking this button you agree to our Privacy Policy statement

close form
Free PVS‑Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

close form
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

close form
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

close form
check circle
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V789. Iterators for the container, used…
menu mobile close menu
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Micro-Optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
Customer specific requests (C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Problems related to code analyzer
Additional information
toggle menu Contents

V789. Iterators for the container, used in the range-based for loop, become invalid upon a function call.

Jun 01 2017

The analyzer has detected invalidation of an iterator in a range-based 'for' loop.

Consider the following example:

std::vector<int> numbers;
for (int num : numbers)
{
  numbers.push_back(num * 2);
}

This code fragment does the same as this one:

for (auto __begin = begin(numbers), __end = end(numbers); 
     __begin != __end; ++__begin) { 
  int num = *__begin; 
  numbers.push_back(num * 2);
}

With the code rewritten in that way, it becomes obvious that the iterators '__begin' and '__end' can be invalidated when executing the 'push_back' function if memory is reallocated inside the vector.

If you simultaneously need to modify the container and read values from it, it is better to use functions that return a new iterator after modification, or indexes in the case of the 'std::vector' class.

References:

This diagnostic is classified as:

You can look at examples of errors detected by the V789 diagnostic.