[previous] 3112 [next] This statement has no side-effect - it can be removed.
Redundancy

This statement has no side effects and so it is useless, Perhaps there is a mistake here ?

For example: 


/*PRQA S 2017,3204,3227,3408 ++*/

void foo(int x)
{
    int n = 0;

    n == x;                      /* Message 3112 */


}

MISRA-C:2004 Rules applicable to message 3112:

Rule  14.2  (Required) All non-null statements shall either (i) have at least one side effect however executed, or (ii) cause control flow to change.

QA·C Source Code Analyser 8.1
MISRA-C:2004 Compliance Module 3.2
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