Segmentation Fault when using MySql from Ruby - please help

ruby-talk
1

Hello,

I have installed the "mysql" gem for Ruby running on Windows.
The version of mysql is 2.7.3, the version of Ruby is 1.8.5.

When I run the following program:

require 'mysql'
mysql=Mysql.init
Mysql.real_connect('localhost','gast','gast','test')
mysql.query('select count(*) from t1')

I get a segmentation fault at the last statement:

···

========================================================================

ex1.rb:5: [BUG] Segmentation fault
ruby 1.8.5 (2006-12-25) [i386-mswin32]

This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.

=======

What am I doing wrong here? Usually I would assume that a SEGV means
there is a bug in the Ruby implementation; but since my code is
so simple and common (simply doing a SQL query), I suspect that it
is in my code.

Ronald

--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162

2

Not sure if this is your segfault... But you're using these in a way I haven't seen. I assign the connect call to an obj and query that...

con_obj = Mysql.real_connect blah
res_set = con_obj.query(blah)

···

-----Original Message-----
From: "Ronald Fischer" <ronald.fischer@venyon.com>
Date: Tue, 22 May 2007 01:27:27
To:ruby-talk@ruby-lang.org (ruby-talk ML)
Subject: Segmentation Fault when using MySql from Ruby - please help

Hello,

I have installed the "mysql" gem for Ruby running on Windows.
The version of mysql is 2.7.3, the version of Ruby is 1.8.5.

When I run the following program:

require 'mysql'
mysql=Mysql.init
Mysql.real_connect('localhost','gast','gast','test')
mysql.query('select count(*) from t1')

I get a segmentation fault at the last statement:

========================================================================

ex1.rb:5: [BUG] Segmentation fault
ruby 1.8.5 (2006-12-25) [i386-mswin32]

This application has requested the Runtime to terminate it in an unusual
way.
Please contact the application's support team for more information.

=======

What am I doing wrong here? Usually I would assume that a SEGV means
there is a bug in the Ruby implementation; but since my code is
so simple and common (simply doing a SQL query), I suspect that it
is in my code.

Ronald

--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162

3

Also make sure that libmysql.dll is in your PATH and available to Ruby.

···

--
Posted via http://www.ruby-forum.com/.

4

Not sure if this is your segfault... But you're using these
in a way I haven't seen. I assign the connect call to an
obj and query that...

con_obj = Mysql.real_connect blah
res_set = con_obj.query(blah)

Indeed, that was it - I used the library in a strange way; and
as we all know: Garbage In - Garbage Out ... :wink:

Thanks a lot,

Ronald

···

--
Ronald Fischer <ronald.fischer@venyon.com>
Phone: +49-89-452133-162