302168 - Valid calculate MIPs generate MDG loop error

Status: RESOLVED WONTFIX

(Core Graveyard :: XForms, defect)

Description

[Allan Beaufour]

As I wrote in bug 301413, we still have a problem in the MDG regarding loops.

The problem is that using expressions with predicates the MDG sometimes collects
to many dependencies. If the expressions are calculate MIPs a loop will exist in
the MDG graph, making the rebuild fail.

Comment 1

[Allan Beaufour]

Attachment: Testcase

Here's a testcase for it.

Comment 2

[Allan Beaufour]

(In reply to comment #1)
Attachment 190522 [details] fails because the MDG fails to see that '[2]' is a constant
predicate, and thus adds '/root/useArray/use/dont' (all three dont nodes) as a
dependency to both bind 'use1dont' and 'use3dont', resulting in:
use[1]/dont => use[3]/dont => use[1]/dont

I think this should be done as part of bug 265212, as I would rather leave code
that needs to die alone...

Comment 3

[David Bolter [:davidb] (NeedInfo me for attention)]

RIP xforms