<smiles> realized that after I posted (and had first injection of caffeine)
> -----Original Message----- > From: Richard Blewett [mailto:[EMAIL PROTECTED] > Sent: Thursday, August 28, 2003 3:06 PM > To: [EMAIL PROTECTED] > Subject: Re: [ADVANCED-DOTNET] [inbox] Re: [ADVANCED-DOTNET] > Nasty bug in 1.0and 1.1 compiler > > > Joe, as you can see from the bare bones version I posted it > doesn't have to > do with using per se but rather having an empty try as the > last statement of > an if statement > > Regards > > Richard Blewett > DevelopMentor > > -----Original Message----- > From: Moderated discussion of advanced .NET topics. > [mailto:[EMAIL PROTECTED] On Behalf Of Reich, Joe > Sent: 28 August 2003 15:48 > To: [EMAIL PROTECTED] > Subject: [inbox] Re: [ADVANCED-DOTNET] Nasty bug in 1.0 and > 1.1 compiler > > I don't have a compiler near me at the moment (web accessing > from home) > but as *I* understand using blocks [1] they basically translate into a > try/finally where a special instance of the IDisposable object is > created for you and then always disposed in a finally block. Well, at > least that's how I understand it to work "logically"...don't know if > implementation is precisely like that...but the gist should be close. > > I *think* what is happening, is that the optimizer is having > issues with > the nested using blocks because it's getting confused on the local > scoping of the specialInstance of the IDisposable object that > is created > for you. I've heard of something similar happening within > VB.NET as well > within For/Next blocks when trying to use an Exit For statement... > > Nice catch though, I'll make be aware of it when programming in the > future. > > > -----Original Message----- > > From: Richard Blewett > > Sent: Wednesday, August 27, 2003 12:35 PM > > To: [EMAIL PROTECTED] > > Subject: [ADVANCED-DOTNET] Nasty bug in 1.0 and 1.1 compiler > > > > > > The code below executes both the if and the else > > in release build with optimization turned on > > > > <code> > <snipped /> > > </code> > > > > commenting out the using block in the if block or putting > > code after the using block in the if resolves the problem > > > > Regards > > > > Richard Blewett > > DevelopMentor > > > > [1] > class DisposableClass : Idisposable {public void Dispose(){}} > > class Class1 > { > static void Main(string[] args) > { > try > { > try > { > DisposableClass specialInstance = new DisposableClass() > > try > { > if(args.Length == 0) > { > Console.WriteLine("IN THE IF"); > try > { > DisposableClass specialInstance = new DisposableClass() > //nothing to do > } > finally > { > specialInstance.Dispose(); > } > } > else > { > Console.WriteLine("IN THE ELSE"); > try > { > DisposableClass specialInstance = new DisposableClass() > //nothing to do > } > finally > { > specialInstance.Dispose(); > } > } > } > catch(System.Exception) {} > } > finally > { > specialInstance.Dispose(); > } > } > catch(System.Exception) {} > > Console.WriteLine("ending called"); > } > } > > =================================== > This list is hosted by DevelopMentor(r) http://www.develop.com > NEW! ASP.NET courses you may be interested in: > > 2 Days of ASP.NET, 29 Sept 2003, in Redmond > http://www.develop.com/courses/2daspdotnet > > Guerrilla ASP.NET, 13 Oct 2003, in Boston > http://www.develop.com/courses/gaspdotnet > > View archives and manage your subscription(s) at http://discuss.develop.com --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.512 / Virus Database: 309 - Release Date: 19/08/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.512 / Virus Database: 309 - Release Date: 19/08/2003 =================================== This list is hosted by DevelopMentor(r) http://www.develop.com NEW! ASP.NET courses you may be interested in: 2 Days of ASP.NET, 29 Sept 2003, in Redmond http://www.develop.com/courses/2daspdotnet Guerrilla ASP.NET, 13 Oct 2003, in Boston http://www.develop.com/courses/gaspdotnet View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor� http://www.develop.com NEW! ASP.NET courses you may be interested in: 2 Days of ASP.NET, 29 Sept 2003, in Redmond http://www.develop.com/courses/2daspdotnet Guerrilla ASP.NET, 13 Oct 2003, in Boston http://www.develop.com/courses/gaspdotnet View archives and manage your subscription(s) at http://discuss.develop.com
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