Ironruby core - Feb 2008 - Can't run script after engine exception

Hi All,

I''ve got a problem where if I execute a Ruby script that has a syntax
error or missing method and that correctly fails I cannot use that
engine object to subsequently execute a valid script. If I restart the
application and re-execute the corrected script it works. It''s only
executing an erroneous script and then a valid script that fails.

The code I''m using to run the script is:

IScriptEnvironment scriptEnvironment = IronRuby.CreateRuntime();
IScriptEngine rubyengine = IronRuby.GetEngine(scriptEnvironment);
SourceUnit scriptSource rubyengine.CreateScriptSourceFromString(myScript);
IScriptScope scope = rubyengine.CreateScope();
rubyengine.Execute(scope, scriptSource);

Does anyone know if there is anyway to re-initialise the Ruby engine
after a syntax or methodmissing exception so scripts can be executed
again without needing to restart the application?

Regards,

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

Could you sent a full repro containing the source code of both scripts and the
order of execution?

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Aaron Clauson
Sent: Monday, February 18, 2008 8:17 PM
To: ironruby-core at rubyforge.org
Subject: [Ironruby-core] Can''t run script after engine exception

Hi All,

I''ve got a problem where if I execute a Ruby script that has a syntax
error or missing method and that correctly fails I cannot use that
engine object to subsequently execute a valid script. If I restart the
application and re-execute the corrected script it works. It''s only
executing an erroneous script and then a valid script that fails.

The code I''m using to run the script is:

IScriptEnvironment scriptEnvironment = IronRuby.CreateRuntime();
IScriptEngine rubyengine = IronRuby.GetEngine(scriptEnvironment);
SourceUnit scriptSource rubyengine.CreateScriptSourceFromString(myScript);
IScriptScope scope = rubyengine.CreateScope();
rubyengine.Execute(scope, scriptSource);

Does anyone know if there is anyway to re-initialise the Ruby engine
after a syntax or methodmissing exception so scripts can be executed
again without needing to restart the application?

Regards,

Aaron
--
Posted via http://www.ruby-forum.com/.
_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core

Tomas Matousek wrote:
> Could you sent a full repro containing the source code of both scripts 
> and the order of execution?
> 
> Tomas
I thought I''d made a mistake for a while as I was having real
difficulty
reapeating the problem. However I''ve found that it''s a
particular type
of syntax error that causes the problem rather than any syntax error. 
The end statement missing on an if block is the culprit. Below is the 
code that illustrates the problem:

IScriptEnvironment scriptEnvironment = IronRuby.CreateRuntime();
IScriptEngine rubyengine = IronRuby.GetEngine(scriptEnvironment);

string goodScript @"
if true
 puts ''Ruby is cool''
end";

string badScript @"
if true
 puts ''Ruby is cool''
";

Console.WriteLine("Attempting run1 (good script).");
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(goodScript));

try
{
  Console.WriteLine("Attempting run2 (bad script).");
 
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(badScript));
}
catch (Exception excp)
{
  Console.WriteLine(excp.GetType());
}

try
{
  Console.WriteLine("Attempting run3 (good script).");
 
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(goodScript));
}
catch (Exception excp2)
{
  Console.WriteLine(excp2.GetType());
}

Output:

Attempting run1 (good script).
Ruby is cool
Attempting run2 (bad script).
Microsoft.Scripting.SyntaxErrorException
Attempting run3 (good script).
Microsoft.Scripting.SyntaxErrorException

Regards,

Aaron

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

Thanks, will investigate.

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Aaron Clauson
Sent: Monday, February 18, 2008 10:09 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] Can''t run script after engine exception

Tomas Matousek wrote:
> Could you sent a full repro containing the source code of both scripts
> and the order of execution?
>
> Tomas
I thought I''d made a mistake for a while as I was having real
difficulty
reapeating the problem. However I''ve found that it''s a
particular type
of syntax error that causes the problem rather than any syntax error.
The end statement missing on an if block is the culprit. Below is the
code that illustrates the problem:

IScriptEnvironment scriptEnvironment = IronRuby.CreateRuntime();
IScriptEngine rubyengine = IronRuby.GetEngine(scriptEnvironment);

string goodScript @"
if true
 puts ''Ruby is cool''
end";

string badScript @"
if true
 puts ''Ruby is cool''
";

Console.WriteLine("Attempting run1 (good script).");
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(goodScript));

try
{
  Console.WriteLine("Attempting run2 (bad script).");
 
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(badScript));
}
catch (Exception excp)
{
  Console.WriteLine(excp.GetType());
}

try
{
  Console.WriteLine("Attempting run3 (good script).");
 
rubyengine.Runtime.ExecuteSourceUnit(rubyengine.CreateScriptSourceFromString(goodScript));
}
catch (Exception excp2)
{
  Console.WriteLine(excp2.GetType());
}

Output:

Attempting run1 (good script).
Ruby is cool
Attempting run2 (bad script).
Microsoft.Scripting.SyntaxErrorException
Attempting run3 (good script).
Microsoft.Scripting.SyntaxErrorException

Regards,

Aaron

--
Posted via http://www.ruby-forum.com/.
_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core

Note that this happens in rbx as well, if you make a syntax error, you
can''t do any thing any more and have to exit the interpreter.

On Feb 18, 2008 11:32 PM, Tomas Matousek <Tomas.Matousek at microsoft.com>
wrote:
> Could you sent a full repro containing the source code of both scripts and
the order of execution?
>
> Tomas
>
>
> -----Original Message-----
> From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces
at rubyforge.org] On Behalf Of Aaron Clauson
> Sent: Monday, February 18, 2008 8:17 PM
> To: ironruby-core at rubyforge.org
> Subject: [Ironruby-core] Can''t run script after engine exception
>
> Hi All,
>
> I''ve got a problem where if I execute a Ruby script that has a
syntax
> error or missing method and that correctly fails I cannot use that
> engine object to subsequently execute a valid script. If I restart the
> application and re-execute the corrected script it works. It''s
only
> executing an erroneous script and then a valid script that fails.
>
> The code I''m using to run the script is:
>
> IScriptEnvironment scriptEnvironment = IronRuby.CreateRuntime();
> IScriptEngine rubyengine = IronRuby.GetEngine(scriptEnvironment);
> SourceUnit scriptSource >
rubyengine.CreateScriptSourceFromString(myScript);
> IScriptScope scope = rubyengine.CreateScope();
> rubyengine.Execute(scope, scriptSource);
>
> Does anyone know if there is anyway to re-initialise the Ruby engine
> after a syntax or methodmissing exception so scripts can be executed
> again without needing to restart the application?
>
> Regards,
>
> Aaron
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>


-- 
Michael Letterle
[Polymath Programmer]
http://michaeldotnet.blogspot.com