Re: [Gretl-devel] strange bug (due to bundles?)
On Fri, 10 May 2013, Sven Schreiber wrote:
I think I found a bug in gretl that is quite subtle. The
attached script demonstrates the bug -- or actually in its
current form it demonstrates how to work around the bug.
[...]
Thanks, Sven. Actually, not so terribly subtle. What's broken
is the idiom
bundle.member -= decrement
bundle.member += increment
and the moment I saw that I thought "Uh oh, that's not going
to work, is it?" If you replace it with
bundle.member = bundle.member - decrement
bundle.member = bundle.member + decrement
it should work fine.
Obviously, however, we need to either (a) make the idiom you
cited work right or (b, last resort) disallow it with an error
message -- and not just silently mess up.
Allin