From: Garthy X <redmine@...>
Date: 2010-11-15T11:36:06+09:00
Subject: [ruby-core:33185] [Ruby 1.9-Bug#4047] Embedded Ruby issues


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Issue #4047 has been updated by Garthy X.

File crashtest-20101115a.tgz added

Short version: Whatever the original cause of the crash, things seem to b=
e working fine now.

Long version:

Okay, I've run through around 4000 iterations each with these configurati=
ons:

- CentOS 5.3 (base install, not updated) Ruby 1.8.3
- CentOS 5.3 (base install, not updated) Ruby 1.9.2-p0
- CentOS 5.3 (base install, not updated) Ruby 1.9.1-p378
- CentOS 5.3 (base install, not updated) Ruby Nightly snapshot 20101112
- Ubuntu 9.10 (updated fairly recently) Ruby 1.8.3
- Ubuntu 9.10 (updated fairly recently) Ruby Nightly snapshot 20101112

The original symptoms were a crash usually after about 100-200 iterations=
. 4000 iterations suggests the problem may be gone. The particular system=
 it was run on seemed to affect the results (some seemed immune). It also=
 only manifested with "-pg", as far as I could tell.

It is possible that the systems I tried it on are sufficiently different =
to the older ones that the bug no longer exists. Unfortunately, these sys=
tems are now long gone, so I cannot try them out.

It could also have been related to the compiler or compilation; I had to =
patch math.c in the 1.8.* series and cont.c in the 1.9* series to get the=
m to build this time around (gcc 4.4.1 on Ubuntu 9.10, updated). I didn't=
 have to do this previously.

It is also possible that I had a similar problem in my project at the tim=
e that was similar to the one in the test code, and it just happened to w=
ork most of the time on certain systems, whilst crashing frequently on ot=
hers.

I'll run some longer overnight tests the next few days to be sure, but if=
 there is indeed a bug in Ruby at this point, I can't reproduce it any mo=
re. Whatever the original cause, things appear to be working fine now.

Updated crash test code included as attachment.

Thankyou again Nobuyoshi Nakada for having a look at it and for finding a=
nd fixing the fault in my sample code.

----------------------------------------
http://redmine.ruby-lang.org/issues/show/4047

----------------------------------------
http://redmine.ruby-lang.org

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