Fix #13072 FN constVariablePointer for nested array access (regression) (#6773)

Author: chrchr-github

lib/checkother.cpp

@@ -1658,7 +1658,7 @@ void CheckOther::checkConstPointer()
             continue;
         if (deref != NONE) {
             const Token* gparent = parent->astParent();
-            while (Token::simpleMatch(gparent, "[") && parent->str() == gparent->str())
+            while (Token::simpleMatch(gparent, "[") && parent != gparent->astOperand2() && parent->str() == gparent->str())
                 gparent = gparent->astParent();
             if (deref == MEMBER) {
                 if (!gparent)

test/testother.cpp

@@ -4193,6 +4193,12 @@ class TestOther : public TestFixture {
               "}\n");
         ASSERT_EQUALS("[test.cpp:2]: (style) Parameter 's' can be declared as pointer to const\n",
                       errout_str());
+
+        check("void f(int* a, int* b, int i) {\n" // #13072
+              "    a[b[i]] = 0;\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:1]: (style) Parameter 'b' can be declared as pointer to const\n",
+                      errout_str());
     }
 
     void constArray() {