:root BACK failure on ABCL

[`bg`]

ASDF 3.0.3
ABCL 1.2.1
x86-64 arch

; Use case:
(asdf:initialize-source-registry
  '(:source-registry (:tree (:root "../"))
    :ignore-inherited-configuration))

#<THREAD "interpreter" {D5C4EE6}>: Debugger invoked on condition of type FILE-ERROR
  Unsupported directory component BACK.

Use case works with SBCL 1.1.7 and CCL 1.9.

; Workaround for ABCL:
(asdf:initialize-source-registry
  `(:source-registry (:tree ,(truename "../"))
    :ignore-inherited-configuration))

[Faré (fahree)]

This sounds like an ABCL bug, not an ASDF bug. Come back to us if they refuse to fix it.

[Faré (fahree)]

Note that (:root "../") should be the same as (:root) since the root's parent is itself (if defined at all).

If you want getcwd's parent, you should probably use (parent-directory-pathname (getcwd)). truename will presumably merge with *default-pathname-defaults* which can be something altogether different (and itself a relative pathname).

[Faré (fahree)]

I sent a message to the armedbear-devel mailing-list. This is definitely a bug in ABCL 1.2.1. Question: should UIOP try to paper over it, by, e.g. using :up instead?

[Faré (fahree)]

The ABCL team is responsive, and Mark Evenson says the ABCL team is on it.
http://abcl.org/trac/ticket/335

I propose we don't bother kluging UIOP. Marking as Won't Fix.