* [bug #30116] (guile) introduces a cycle in the submodules subtree
@ 2010-06-11 15:31 Jose Antonio Ortega Ruiz
2010-06-14 9:56 ` Andy Wingo
0 siblings, 1 reply; 3+ messages in thread
From: Jose Antonio Ortega Ruiz @ 2010-06-11 15:31 UTC (permalink / raw)
To: Jose Antonio Ortega Ruiz, bug-guile
URL:
<http://savannah.gnu.org/bugs/?30116>
Summary: (guile) introduces a cycle in the submodules
subtree
Project: Guile
Submitted by: jao
Submitted on: Fri 11 Jun 2010 03:31:13 PM GMT
Category: None
Severity: 3 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
_______________________________________________________
Details:
Define the auxiliary procedure:
(define (submodules m)
(hash-map->list list (module-submodules m)))
which just extracts a list of submodules of `m'. Now apply it to the '(guile)
module:
(define gm (resolve-module '(guile) #f))
(submodules m)
this evaluates to a duplicate submodule with different names:
((%app #<module (%app) 84e7c60>) (app #<module (%app) 84e7c60>))
Asking for the submodules of either one of those gives:
(define (submodules* m) (cdr (submodules m)))
(submodules* (car (submodules* m)) => (#<module () 84e7ea0>)
and getting the submodules of this last one, one obtains the list of top
level modules, which again includes `gm'. That means that the module tree
isn't actually a tree, but a DAG, which sounds weird to me (and will most
probably provoke infinite loops in module folders).
Also, the duplicated submodule of '(guile) seems an implementation detail
accidentally leaked (hiding it would break the cycle).
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?30116>
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2010-06-11 15:31 [bug #30116] (guile) introduces a cycle in the submodules subtree Jose Antonio Ortega Ruiz
2010-06-14 9:56 ` Andy Wingo
2010-06-14 9:56 ` Andy Wingo
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