Question for Wraith Scheme users, if any are present ...

[Jay Reynolds Freeman]

This message will only be of interest if you use, or have used, any
version of Wraith Scheme (which is a shareware / open-source R5
implementation for the Macintosh).

I am the developer of Wraith Scheme. A user has reported a *very*
strange bug, which I cannot duplicate on any hardware/software
configuration I have access to, and which I have never seen the like
of, or heard about from any other user. I would like to ask any
Wraith Scheme users who may be present if they have, or have not, seen
it. Replying off-list is probably preferable.

This user is running Wraith Scheme 2.00 on an iMac model 8,1 with 4 GB
memory and MacOS 10.6.2; he reports the same behavior for Wraith
Scheme 1.35 run on the same platform. (2.00 is the 64-bit
implementation, 1.35 is 32-bit.)

What happens is this: He types as input some ordinary S-expression,
say

(+ 4 3) <return>

and properly gets 7, but then when he tries to type the next line of
input, every time he types a blank space, the input line is
momentarily replaced by "(+ 4 3)". That is, if he types "( " (with a
blank space after the left paren), then his input line momentarily
looks like

(+ 4 3)

instead of

(*

But if he keeps typing -- say he meant to type (* 5 7) and then types
the "5" -- the line returns to normal, at least until the next blank
space.

In the cynical nature of things, Wraith Scheme doesn't do that on my
Mac Pro, my Macbook 13, or my old G3 iBook, but I do not have an iMac
to test on ...

I won't ask the group to help me debug, but if I can learn whether
anyone else has ever seen anything like this in any Wraith Scheme
version, it might help me figure out whether the problem is with his
hardware, with a particular hardware/software configuration, or what.

Thanks.

-- Jay Reynolds Freeman
---------------------
Jay_Reynol...@mac.com
http://web.mac.com/jay_reynolds_freeman (personal web site)