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Re: debugging help: how to read/use a backtrace?

From: Jan Nieuwenhuizen
Subject: Re: debugging help: how to read/use a backtrace?
Date: Tue, 07 Mar 2017 16:42:21 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux)

Andy Wingo writes:

> On Sat 21 Jan 2017 11:21, Jan Nieuwenhuizen <address@hidden> writes:
>> I often find myself struggling to pinpoint an error location from
>> Guile's backtrace (see below) and I am starting to wonder if there is
>> something that I'm missing.
> I believe this is comprehensively cleaned up and improved in 2.1.x.
> (Guile 2.0 tries to identify the procedure by looking at slot 0; Guile
> 2.2 instead uses the instruction pointer of the frame.)  Can you
> confirm?

Sadly no; this is 2.1.x (x=5 probably) as you can see from this bit

     l/l=#<procedure 13000a0 at ice-9/eval.scm:342:13 (a b c d)>

which points to

      ((4) (lambda (env)
             (lambda (a b c d)
               (body (make-env* env a b c d)))))

which in turn suggests that I am missing something/hitting problems
that most of you do not have?


Jan Nieuwenhuizen <address@hidden> | GNU LilyPond
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