Bug in fix mode in rule AVOID_NULL_CHECK

[Arrgentum]

Describe the bug

Rule AVOID_NULL_CHECK in fix mode give result

splitOffset?.let {
   val listParentSearch = listOf(BINARY_EXPRESSION, PARENTHESIZED, FUN)
   if (parent.treeParent.elementType in listParentSearch || parent.treeParent.treeParent.elementType == FUNCTION_LITERAL) {
          parent = parent.treeParent
   } else {
            return checkBinaryExpression(parent, configuration)
   }
} ?: parent = parent.treeParent

But then an error is Variable Expected

Expected behavior

splitOffset?.let {
    val listParentSearch = listOf(BINARY_EXPRESSION, PARENTHESIZED, FUN)
    if (parent.treeParent.elementType in listParentSearch || parent.treeParent.treeParent.elementType == FUNCTION_LITERAL) {
           parent = parent.treeParent
    } else {
           return checkBinaryExpression(parent, configuration) 
   }
 } ?: run { parent = parent.treeParent }

Code should be like this

Environment information

• diktat version: 1.1.0

[petertrr]

minimal reproducible example, I believe the whole body of let is not important here.

Also, please provide original code when reporting autofixer issues.

But then an error is

Please specify more explicitly, whether fixed code has diktat errors or syntax errors, like here

[sanyavertolet]

In save-cloud we found out that construction

src = avatar?.let {
    "/api/$v1/avatar$it"
}
    ?: run {
        "img/company.svg"
    }

is not fixed into

src = avatar?.let {
    "/api/$v1/avatar$it"
} 
    ?: "img/company.svg"

Need to investigate.