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Cc: Mark Shinwell <mshinwell@janestreet.com>,
 "caml-list@inria.fr" <caml-list@inria.fr>
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From: Ivan Gotovchits <ivg@ieee.org>
Date: Thu, 19 Dec 2013 08:00:14 +0400
To: Yaron Minsky <yminsky@janestreet.com>
Subject: Re: [Caml-list] Core breaks backtraces


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> On 18 =C4=C5=CB. 2013 =C7., at 16:01, Yaron Minsky <yminsky@janestreet.co=
m> wrote:
>=20
> Do you need to set OCAMLRUNPARAM to trigger the problem?  I'm curious bec=
ause Core enables backspaces by default.=20
>=20
No, I didn't.=20
> It would be great if you can post precise steps for reproducing this, alo=
ng with the platform details, on the bug tracker:
>=20
> https://github.com/janestreet/core_kernel/issues
>=20
> To say the obvious, I use core both on Linux and the Mac and have never s=
een this, so I suspect something about your setup is tickling this issue.
>=20
I'll do my best, but it is only observable with my program. I cannot reprod=
uce it, using simple steps.=20

It'll be helpful if you provide some clues on where to dig in core. I'm new=
 to core and it is overwhelmingly large. It will be easier for me to trace =
the problem, if I  understand what core do with the backtraces.

>> On Dec 18, 2013 6:45 AM, "Mark Shinwell" <mshinwell@janestreet.com> wrot=
e:
>> On 18 December 2013 06:17, Ivan Gotovchits <ivg@ieee.org> wrote:
>> > I've tried a fabulous core library and it broke my exceptions :)
>> > All backtraces are now look like this
>> >
>> >   backtrace:
>> >   Raised at file "map.ml", line 117, characters 16-25
>> >   Called from file "lib/conv.ml", line 256, characters 19-50
>> >
>> > Next, if I enable backtrace recording with OCAMLRUNPARAM environment
>> > variable and compile a .d.byte version of my application than on an
>> > exception occurrence core eats all my memory thus killing my machine.
>> >
>> > Any clues, what happens?
>> >
>> > P.S. removing Core.Std from project fixes all issues.
>> > P.P.S. My application is rather large and uses lots of processes and
>> > lwt, moreover it enables lwt backtracing via ocamlbuild plugin.
>> >
>> > P.P.P.S . By using core I mean just opening Core.Std in a an empty
>> > module, this is enough to broke my system.
>>=20
>> Are you always building bytecode?  Which version of the
>> compiler, which operating system, and on which hardware
>> platform?  Does this happen when you compile for native code?
>>=20
>> I suggest you also try copying the contents of core/lib/std.ml
>> into your empty module and bisecting to determine which
>> of the Core modules causes the failure.
>>=20
>> Mark
>>=20
>> --
>> Caml-list mailing list.  Subscription management and archives:
>> https://sympa.inria.fr/sympa/arc/caml-list
>> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
>> Bug reports: http://caml.inria.fr/bin/caml-bugs

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=
=3Dutf-8"></head><body dir=3D"auto"><div><br></div><div><br>On 18 =D0=B4=D0=
=B5=D0=BA. 2013 =D0=B3., at 16:01, Yaron Minsky &lt;<a href=3D"mailto:ymins=
ky@janestreet.com">yminsky@janestreet.com</a>&gt; wrote:<br><br></div><bloc=
kquote type=3D"cite"><div><p dir=3D"ltr">Do you need to set OCAMLRUNPARAM t=
o trigger the problem?&nbsp; I'm curious because Core enables backspaces by=
 default.&nbsp; </p></div></blockquote>No, I didn't.&nbsp;<br><blockquote t=
ype=3D"cite"><div>
<p dir=3D"ltr">It would be great if you can post precise steps for reproduc=
ing this, along with the platform details, on the bug tracker:</p>
<p dir=3D"ltr"><a href=3D"https://github.com/janestreet/core_kernel/issues"=
>https://github.com/janestreet/core_kernel/issues</a></p>
<p dir=3D"ltr">To say the obvious, I use core both on Linux and the Mac and=
 have never seen this, so I suspect something about your setup is tickling =
this issue.</p></div></blockquote><div>I'll do my best, but it is only obse=
rvable with my program. I cannot reproduce it, using simple steps.&nbsp;</d=
iv><div><br></div><div>It'll be helpful if you provide some clues on where =
to dig in core. I'm new to core and it is overwhelmingly large. It will be =
easier for me to trace the problem, if I &nbsp;understand what core do with=
 the backtraces.</div><br><blockquote type=3D"cite"><div>
<div class=3D"gmail_quote">On Dec 18, 2013 6:45 AM, "Mark Shinwell" &lt;<a =
href=3D"mailto:mshinwell@janestreet.com">mshinwell@janestreet.com</a>&gt; w=
rote:<br type=3D"attribution"><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 18 December 2013 06:17, Ivan Gotovchits &lt;<a href=3D"mailto:ivg@ieee.o=
rg">ivg@ieee.org</a>&gt; wrote:<br>
&gt; I've tried a fabulous core library and it broke my exceptions :)<br>
&gt; All backtraces are now look like this<br>
&gt;<br>
&gt; &nbsp; backtrace:<br>
&gt; &nbsp; Raised at file "<a href=3D"http://map.ml" target=3D"_blank">map=
.ml</a>", line 117, characters 16-25<br>
&gt; &nbsp; Called from file "lib/<a href=3D"http://conv.ml" target=3D"_bla=
nk">conv.ml</a>", line 256, characters 19-50<br>
&gt;<br>
&gt; Next, if I enable backtrace recording with OCAMLRUNPARAM environment<b=
r>
&gt; variable and compile a .d.byte version of my application than on an<br>
&gt; exception occurrence core eats all my memory thus killing my machine.<=
br>
&gt;<br>
&gt; Any clues, what happens?<br>
&gt;<br>
&gt; P.S. removing Core.Std from project fixes all issues.<br>
&gt; P.P.S. My application is rather large and uses lots of processes and<b=
r>
&gt; lwt, moreover it enables lwt backtracing via ocamlbuild plugin.<br>
&gt;<br>
&gt; P.P.P.S . By using core I mean just opening Core.Std in a an empty<br>
&gt; module, this is enough to broke my system.<br>
<br>
Are you always building bytecode? &nbsp;Which version of the<br>
compiler, which operating system, and on which hardware<br>
platform? &nbsp;Does this happen when you compile for native code?<br>
<br>
I suggest you also try copying the contents of core/lib/<a href=3D"http://s=
td.ml" target=3D"_blank">std.ml</a><br>
into your empty module and bisecting to determine which<br>
of the Core modules causes the failure.<br>
<br>
Mark<br>
<br>
--<br>
Caml-list mailing list. &nbsp;Subscription management and archives:<br>
<a href=3D"https://sympa.inria.fr/sympa/arc/caml-list" target=3D"_blank">ht=
tps://sympa.inria.fr/sympa/arc/caml-list</a><br>
Beginner's list: <a href=3D"http://groups.yahoo.com/group/ocaml_beginners" =
target=3D"_blank">http://groups.yahoo.com/group/ocaml_beginners</a><br>
Bug reports: <a href=3D"http://caml.inria.fr/bin/caml-bugs" target=3D"_blan=
k">http://caml.inria.fr/bin/caml-bugs</a><br>
</blockquote></div>
</div></blockquote></body></html>=

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