causes for an invalid memory reference?

[Thomas König]

Damian,

> The other part was
> because I try to make code as compact as possible before
> submitting the code to compiler developers.  In this case, the
> same behavior happens with the DO loop and the implied DO loop.

Implied DO loops have their own code paths through the compiler, which are often more complex than for normal DO loops.

If you file a bug report with self-contained examples, please include variants like that, or we might miss the bug next door, so to speak 😉