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V3524. AUTOSAR. The value of uninitiali…
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V3524. AUTOSAR. The value of uninitialized variable should not be used.

Mar 03 2021

This diagnostic rule is based on the software development guidelines developed by AUTOSAR (AUTomotive Open System ARchitecture).

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:

  • AUTOSAR-M8.5.1
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