No dot-to-arrow completion in function parameter list

#include <QString>

typedef struct Foo {
  int bar;
} Foo;

void baz(Foo *foo)
{
  // typing "foo.bar" is correctly completed to foo->bar here
  foo->bar = 42;

  // and here too
  int i = foo->bar;

  // but typing "foo.bar" here is *not* corrected
  // afterwards, a fix it "did you mean to use '->'?" appears
  QString s = QString::number(foo.bar);
}