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• iPhone App takes up too much memory

  - by Stephen Furlani

  Ok, so here's my problem. My iPhone app is 1.2MB on disk. Granted I have a bunch of Images for the GUI buttons and backgrounds, etc. In-memory, my app takes up a whopping 15MB! That means if I then take a picture with the camera, 8MB default, it gives a memory warning (several) even before the picker calls its delegate! How can I tell what is grabbing so much memory, and how to remove it? I've removed all of my debugging symbols and added [-Os], but it still takes up a huge amount of memory! Also, (how) can I change the default resolution of the camera?

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• Unmangling the result of std::type_info::name

  - by terminus

  I'm currently working on some logging code that supposed to - among other things - print information about the calling function. This should be relatively easy, standard C++ has a type_info class. This contains the name of the typeid'd class/function/etc. but it's mangled. It's not very usefull. I.e. typeid(std::vector).name() returns "St6vectorIiSaIiEE". Is there a way to produce something usefull from this? Like 'std::vector' for the above example. If it only works for non-template classes, that's fine too. The sollution should work for gcc, but it would be better if I could port it. It's for logging so it's not so important that it can't be turned of, but it should be helpfull for debugging.

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• An existing connection was forcibly closed by the remote host

  - by Alexander

  I am about to give up debugging SMTP servers to send email... My code is the following private void SendMail() { SmtpClient mailClient = new SmtpClient("smtp.mail.yahoo.com", 465); mailClient.EnableSsl = true; MailMessage message = new MailMessage(); message.To.Add("[email protected]"); message.Subject = "i wish it would work"; MailAddress fromAddress = new MailAddress(Email.Text, Name.Text); message.From = fromAddress; mailClient.Send(message); }

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• Can I attach a .NET TraceListener to an externally running process?

  - by BBlake

  I am developing an application scheduling program that will run other applications using System.Diagnostics.Process. The external applications are of various types (some .NET and some not). For those external apps that have trace logging enabled, is there a way that I can attach the tracelistener of the parent/calling application to listen to and record all the trace output from the child/called application to the parent application's trace output? This is not primarily for debugging purposes. This is more to track trace output from all the various scheduled applications by collecting it into one place as much as possible. The scheduler app is still in the early design stages, but will be .NET, and I'm trying to clear up potential design issues before I get into it too far.

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• Accommodating null values in a list?

  - by h259bws

  Hi, I'm new to Java and Groovy and am running into trouble with the following Groovy script. I created this whittled down version of a larger script to facilitate debugging. The script is iterating through a list trying to calc a running total of the values of all objects in the list. Some or all of these objects' values may be null. Script import org.apache.commons.lang.math.NumberUtils class Field { def name def value } def fields = [ new Field(name:'Annuities %', value:75), new Field(name:'Other %', value:null), ] //def totalFunding = fields.inject(0) {int total, Field myField - // total + NumberUtils.toInt(myField.value,0) as Integer def totalFunding = fields.inject(0) {int total, Field myField - total + myField?.value as Integer } It gets this error: Exception thrown: java.lang.NullPointerException java.lang.NullPointerException at Script3$_run_closure1.doCall(Script3:15) at Script3.run(Script3:14) What is the correct way to accomodate null values? Thanks, Betsy

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• Where does output of print in kernel go?

  - by apoorv020

  I am debugging a driver for linux (specifically ubuntu server 9.04), and there are several printf statements in the code. Where can I view the output of these statements? EDIT1: What i'm trying to do is write to kernel using the proc file-system. The print code is static int proc_fractel_config_write(struct file *file, const char *argbuf, unsigned long count, void *data) { printk(KERN_DEBUG "writing fractel config\n"); ... In kern.log when I see the following message when i try to overwrite the file /proc/net/madwifi/ath1/fractel_config (with varying time of course). [ 8671.924873] proc write [ 8671.924919] Any explainations?

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• Delete file after sharing via intent.

  - by Matt

  I'm trying to delete a temporary file after sharing it via android's Intent.ACTION_SEND feature. Right now I am starting the activity for a result and in OnActivityResult, I am deleting the file. Unfortunately this only works if I am debugging it with a breakpoint, but when I let it run freely and say, email the file, the email has no attachment. I think what is happening is my activity is deleting the file before it had been emailed. What I don't get is why, shouldn't onActivityResult only be called AFTER the other activity is finished? I have also tried deleting the file in onResume, but no luck. Is there a better way to do this?

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• qapps runs well but breakpoint sometimes generates segmentation fault

  - by yan bellavance

  I have a qApp that generates a segmentation fault only when a breakpoint is inserted in the code (I can put it at different places) and only after 4-5 breakpoint stops. Do I have a problem with my code or is this a DBG bug. the method is part of a QThread Class. Basically what I did is i took the mandlebrot example, and have 3 instances of it in my program. So the program would look like a mainwindow that has 3 mandlebrot widgets in it, one besides the other. Is it possible that GDB doesnt support debugging qthread subclasses that are instantiated multiple times or is it thread-unsafe to do so. I dont have any problems at run-time.

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• Why this button doesn't cause triple postback?

  - by focus

  We have developed a page with a asp.net and debugging it accidentally we have discovered on our page button with the next code on onclik attribute onclick="__doPostBack('ctl00$FormPlace$m_userTaskMarkAsUnreadButton',''); __doPostBack('ctl00$FormPlace$m_userTaskMarkAsUnreadButton','');WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$FormPlace$m_userTaskMarkAsUnreadButton", "", true, "", "", false, false))" It seems that the button do three postbacks but when we click it only cause on postback. With this code seems that de button will cause three postbacks!! We have try it with Internet Explorer and Firefox and the button only cause on postback always. Are browsers who avoid that the button do three postback ? Or Is Asp.net server who avoid the three postback? We don't understand why the button behaves correctly if onclick attribute has three call to do Postbacks. Thanks

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• PHP - white screen of death!

  - by Industrial

  Hi everyone, After debugging a codeigniter app that were installed into a new development environment, I have started to freak out when seeing white screens with nothing more available. I have been able to solve each and every one of the errors that have caused this, but it have taken seriously way too long time. PHP error_reporting(E_ALL) & display_errors", 1 is set as well. I even installed Xdebug in hope of getting more output, but no. My logging settings are also working, but nothing is written to the log. Is there a way to get something informative printed out instead of a complete white screen? It would certainly shorten my time spent on solving the eventual errors that causes this? Thanks a lot! Reference: http://stackoverflow.com/questions/2149321/why-does-code-igniter-give-me-a-white-page

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• VS 2008 and F# Feb CTP - Can't debug

  - by Steve

  I have downloaded the VS2008 integrated shell, and the F# Feb CTP and I have the F# environment working just fine. The problem comes when I try to debug. Nothing happens at all. The output window says ------ Build started: Project: ConsoleApplication1, Configuration: Debug Any CPU ------ ========== Build: 1 succeeded or up-to-date, 0 failed, 0 skipped ========== and none of my breakpoints are hit. My "program" is as simple as can be #light open System printfn "Hello World" Console.ReadKey(true) with breakpoints on the printfn and Console lines. The things I've read seem to suggest that debugging would work with this setup, and there is a debugger folder under common7/packages with files in it. Thanks for any help. EDIT: I'm on Win7 64 bit

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• Why does initWithFrame have the wrong frame value?

  - by greypoint

  I have a subclass of UIButton called INMenuCard and I am overriding the initWithFrame to include an activity indicator. The menuCard places correctly but any internal reference to "frame" give me "inf,inf,0,0" which means my activityIndicator subview is not placed correctly. What might I be missing? @implementation INMenuCard - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { CGRect innerFrame = CGRectInset(frame, 50.0f, 100.0f); activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:innerFrame]; activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite; [self addSubview:activityIndicator]; } return self; } I am instantiating INMenuCard with (debugging shows the CGRect values are correct): CGRect cardFrame = CGRectMake(cardX, cardStartY, cardWidth, cardHeight); INMenuCard *menuCard = [[INMenuCard buttonWithType:UIButtonTypeCustom] initWithFrame:cardFrame]; [theView addSubView:menuCard];

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• VS2005 and VSS. Should .exes, .dlls, pdbs, .resource and generated .xml files go in VSS?

  - by Velika

  It seems like the following type of files need to be writable to be able to compile a solution. .exe .dll .pdb (if debugging) .resource (?) .xml (at least the system generated ones. I'm not sure if they are just all XML documentationf iles) If they were checked in and could only be overwritten by the compiler by the person who had them checked out, then checking them into sourcesafe and requiring a checkout to modify them, which is attemtped by the compiler each time you run, would interfer with other developer's ability to debug and run. What is the best practice? It seems like VSS automatically adds everything.

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• Magento data-install script

  - by Vladimir Kerkhoff

  I'm trying to build a data install script that I use to setup a new webstore. This script creates the categories, pages and static blocks and default settings for the specific shop (we use a multistore setup to host the shops). In our dev/staging setup this scripts runs great and all categories are build without any problem. But on our live system this script fails. After some debugging I found the difference is in the Flat catalog usage on the live systems. The problem with creating the category with the flat tables enabled is in getting the parent path information based on the parentId given: $parentCategory = Mage::getModel('catalog/category')->load($parentId); Without flat categories enabled this gives a correct parentCategory, but with flat categories enabled it gives an empty object. Why is this behaviour with flat categories enabled?

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• Actionscript 3.0 platformer game

  - by Jez

  I have an flash game with the following code (http://pastie.org/9248528) When I run it, the player just falls and doesn't stop when he hits a platform. I tried debugging it and I had an error with moveCharacter's timer, but I don't know if that is the main problem. I put the player inside the wall and debugged it using breakpoints and it didn't detect that the player was inside the wall, skipping moving it to outside of the wall. If anyone has any ideas on what is wrong with my code then that would be great thanks!

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• Slime: frame-source-location not implemented / is my sldb Backtrace output normal?

  - by Joel

  I'm debugging my Lisp code in Slime. When the debugger generates the Backtrace it's my understanting that I can hit 'v' on a frame to take me to the source. When I do this on the first (0 index) frame (or indeed any frame) I get frame-source-location not implemented Is this expected, am I missing anything? Edit1: In addition every single frame has "No Locals", is this to be expected too? Edit2: In fact, the whole backtrace output is pretty unintelligible. I'm new to Lisp, so I wasn't initially sure if this was expected or not - but I'm attaching a screenshot, hopefully someone can confirm for me if this looks 'normal':

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• Is `eval`ing in a CPAN module without localizing $@ a bug?

  - by rassie

  I think I've encountered a bug in Params::Validate, but I'm not sure whether I identified the problematic code piece correctly. The code in question failed to pass exceptions up the chain (using Try::Tiny), so I started debugging and found out that a class used inside the try block has a destructor. This destructor calls object methods which use Params::Validate and looking into Validate.pm source I see an eval without $@ localization, i.e. the global $@ gets overwritten. Now I see two options: Params::Validate should always localize $@ and thus it's a bug that should be reported. The bug is in the class in question, because it shouldn't use Params::Validate in a destructor. Params::Validate can stay as it is now. Which one is it? How I should I handle this situation? PS: I think that CPAN modules should be rock-solid and neither break themselves nor their environment, hence the question title.

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• Are Ext JS files necessary in a working site?

  - by songdogtech

  I've inherited a high-traffic site that loads some Ext javascript files and I'm trying to trim some bandwidth usage. Are Ext libraries necessary for development only or are they required for the finished site (I've never used Ext.) The site loads ext-base.js, ext-all-debug.js, expander.js, exteditor.js. It appears that expander.js and exteditor.js have some site specific code, so they should stay? But what about ext-base.js and ext-all-debug.js? Am I reading this correctly - are base and debugging libraries necessary for a live site?

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• Recursion function not working properly

  - by jakecar

  I'm having quite a hard time figuring out what's going wrong here: class iterate(): def init(self): self.length=1 def iterated(self, n): if n==1: return self.length elif n%2==0: self.length+=1 self.iterated(n/2) elif n!=1: self.length+=1 self.iterated(3*n+1) For example, x=iterate() x.iterated(5) outputs None. It should output 6 because the length would look like this: 5 -- 16 -- 8 -- 4 -- 2 -- 1 After doing some debugging, I see that the self.length is returned properly but something goes wrong in the recursion. I'm not really sure. Thanks for any help.

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• how to access jquery internal data?

  - by Unknown

  As you may or may not be aware as of jQuery 1.7 the whole event system was rewritten from the ground up. The codebase is much faster and with the new .on() method there is a lot of uniformity to wiring up event handlers. One used to be able to access the internal events data and investiate what events are registered on any given element, but recently this internal information has been hidden based on the following scenario... It seems that the "private" data is ALWAYS stored on the .data(jQuery.expando) - For "objects" where the deletion of the object should also delete its caches this makes some sense. In the realm of nodes however, I think we should store these "private" members in a separate (private) cache so that they don't pollute the object returned by $.fn.data()" Although I agree with the above change to hide the internal data, I have found having access to this information can be helpful for debugging and unit testing. What was the new way of getting the internal jquery event object in jQuery 1.7?

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• Is there a way to determine gaps in try/catch coverage?

  - by Mike Pateras

  I'm debugging a service that's experiencing some problems on start-up. To aid me in this, I'm wrapping pretty much everything in a try/catch block, and writing any errors to a file. I don't want to put them in every method, I just want to put them in the highest level methods so that they catch exceptions from other methods. Something is getting through, though, as the service does stop under some conditions. Is there a way to determine where the gaps in my try/catch coverage are, other than by sight?

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• How to set -Xbootclasspath for a JRE with a custom launcher?

  - by Tom

  I have a Java application which is using a certain Java Runtime Environment. The application uses it's own launcher to startup the java virtual machine. No use of the java.exe, javaw.exe, javaws.exe binaries is being made -- as the application seems to have it's own launcher which is a different executable. This custom launcher is using the rest of the JRE files, such as bin/client/jvm.dll and rt.jar package etc. Now, the problem is that I want to set a boot class path for this custom launcher. The custom launcher does not support the -Xbootclasspath command line parameter, like the default java.exe does. Is there any way for me to set the boot class path now for this java runtime environment? Thanks in advance. Some things to keep in mind: I do not have the source of this application This is meant for self and personal debugging use only, not for distribution

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• VS2008 - 'Set as startup project' setting dissapearing.

  - by UpTheCreek

  I have a solution with a bunch of projects in it. The 'startup' project is a ASP.NET MVC Web Application. I set as the startup project (by right clicking on it in Solution Explorer and selecting 'set as startup project'. The project title goes bold and everything works fine for a while. Then I will be editing one of the supporting projects, and come to click the 'Start Debugging' button, and bang - the 'project of this type cant be started' message. I then check, and the web project is no longer set as the startup project. And so on.... Anyone know why this is happening?

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• Function to identify problematic datatypes

  - by Zach

  I just spent several hours debugging some R code, only to discover that the error was due to an Inf that had sneaked in during my calculations. I had checked for NA, but hadn't thought to check for Inf. I wrote the following function to help prevent this situation in the future: is.bad <- function(x){ is.na(x) | is.nan(x) | is.infinite(x) } > is.bad(c(NA, NaN, Inf, -Inf, 0, 1, 1000, 1e6)) [1] TRUE TRUE TRUE TRUE FALSE FALSE FALSE FALSE Are there any other special data types in R I should be aware of?

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• How can I get an error or a warning from a PreparedStatement?

  - by Geo

  I had an update like this: update table set col1=?,col2=?,col3=? where col4=?; and I filled it up like this: statement.setString(1,"some_value"); statement.setString(2,"some_value"); statement.setString(3,"some_value"); and I forgot to add a fourth value.I did a executeUpdate and of course nothing happened to the database. I spent about 1 hour debugging it, to see where it goes wrong. I then modified my code to print the SQLWarning object returned by the getWarnings method. It always returned null. I even modified the code to the buggy state it was, before I set the fourth parameter, and still no warning. Does anyone know how one can get an error/warning? If it matters, my Connection is set to autoCommit.

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