From: Xavier Leroy <Xavier.Leroy@inria.fr>
To: sumii@ecei.tohoku.ac.jp
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] line number in exception history?
Date: Tue, 11 Oct 2005 11:09:22 +0200 [thread overview]
Message-ID: <434B8142.5000407@inria.fr> (raw)
In-Reply-To: <a4d0794e0510091922r14b715f2kdfb6adc56fab30b8@mail.gmail.com>
> A student in Tokyo (_not_ CS major!) reported a "problem" (see below)
> of ocaml in his blog. I guess it is because the line/character
> numbers point to the _head_ of the expression that _follows_ where the
> exception went through. Is this a feature or a bug?
Your code is strange: you do realize that
raise (invalid_arg "Give me positive!")
is weird because invalid_arg is a function that raises an exception itself?
Assuming that was intended, the backtrace is indeed slightly
inaccurate in two ways:
> Raised at file "pervasives.ml", line 22, character 17
That is correct.
> Re-raised at file "foo.ml", line 3, character 46
That should be "Called from file" but I guess the enclosing "raise"
confused the backtrace printer.
> Called from file "main.ml", line 3, character 2
This is indeed off by one line. In general, the location following the
function call is reported, i.e
function_that_raises arg1 arg2 arg3
^
reported location
while in your example the following "in \n" is skipped. Maybe one of
us will look at this, but I don't fell it's a big issue.
- Xavier Leroy
next prev parent reply other threads:[~2005-10-11 9:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-10 2:22 Eijiro Sumii
2005-10-10 3:24 ` Eijiro Sumii
2005-10-11 9:09 ` Xavier Leroy [this message]
2005-10-11 11:13 ` [Caml-list] " Eijiro Sumii
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