Using Clang code model produces incorrect same variable usage selection

Using Clang code model produces incorrect same-variable-usage-selection 
 

void test() {
  QString s;

  QString ss(s);
  QString s1(m1(s));
  QString s2(m2(s));
}

void test2() {
  QString s;
  QString s2(m2(s));
}

while everything is good without clang code model plugin

Probable the inner cause of this bug is common with QTCREATORBUG-20662