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.

>
>
>
V2538. MISRA. The value of uninitialize…
menu mobile close menu
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of 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

V2538. MISRA. The value of uninitialized variable should not be used.

Apr 24 2019

This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).

If a variable of a POD type isn't initialized explicitly and doesn't have an initializer by default, its value will be undefined. Usage of such value will lead to undefined behavior.

Simple synthetic example:

int Aa = Get();
int Ab;
if (Ab) // Ab - uninitialized variable
  Ab = Foo();
else
  Ab = 0;

Usually errors of using uninitialized variables occur through misprints. For example, it may appear that a different variable should be used in this place. Correct code variant:

int Aa = Get();
int Ab;
if (Aa) // OK
  Ab = Foo();
else
  Ab = 0;

This diagnostic is classified as:

  • MISRA-C-9.1
  • MISRA-CPP-8.5.1