Hi All: I have a VS2019 console app project that generates PDFs. Everything was working fine a month ago. When I re-opened the project and tried to run it, I am receiving a nullreferenceexception error when trying to create the first font in the PdfDocument.
PdfFont bfTimes = PdfFontFactory.CreateFont(StandardFonts.TIMES_ROMAN);
throws:
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=itext.io
StackTrace:
at iText.IO.Font.FontCache..cctor()
I've confirmed the PdfDocument exists, and the font above returns "true" for "isRegistered".
Nothing changed in the project, but I did update VSCommunity to 16.11.2 at some point in the past couple of weeks. Is there any way to get a better error description for what's happening?
i searched for that specific exception error and found this other post from a few weeks ago:
https://csharpforums.net/threads/using-a-winform-to-create-a-pdf-using-itext7.6406/
The suggestion to turn on "just my code" in the debugging options made the error go away like magic :o
I had to investigate when a certain cookie was being set but unfortunately, I couldn't figure it out just seeking in the codebase. So as usual, when the game gets tough, I go and set a symbolic breakpoint. This time, against all odds, I wasn't able to.
In particular, I have been trying to set a symbolic breakpoint to the NSHTTPCookieStorage method setCookie: and neither from the Breakpoint navigator nor from the debug console I couldn't manage to set it.
For example:
(lldb) br set -F '-[NSHTTPCookieStorage setCookie:]'
Breakpoint 6: no locations (pending).
WARNING: Unable to resolve breakpoint to any actual locations.
I have also tried to set the Module (Foundation) but nothing changed. The same happened also for the NSURLSession method downloadTaskWithResumeData:completionHandler: Then I tried with some other Foundation's classes and it always worked, except for all of those who are part of this group inside the Apple Documentation as NSHTTPCookieStorage and NSURLSession.
I thought it could be related to some security concerns but I also remember I applied a symbolic breakpoint to some Keychain and SecKey's symbols.
Did anyone else experience the same? I haven't found any doc where something similar was mentioned.
I do get a resolved bp in my case with the same:
br set -F '-[NSHTTPCookieStorage setCookie:]'
command (side note b '-[NSHTTPCookieStorage setCookie:]' would work to).
It seems in your case lldb has not loaded CFNetwork for whatever reason.
Mine
image lookup -vn '-[NSHTTPCookieStorage setCookie:]'
yields
1 match found in /Users/myusername/Library/Developer/Xcode/iOS DeviceSupport/12.4.1 (16G102)/Symbols/System/Library/Frameworks/CFNetwork.framework/CFNetwork:
Address: CFNetwork[0x0000000181478fbc] (CFNetwork.__TEXT.__text + 51832)
Summary: CFNetwork`-[NSHTTPCookieStorage setCookie:]
Module: file = "/Users/myusername/Library/Developer/Xcode/iOS DeviceSupport/12.4.1 (16G102)/Symbols/System/Library/Frameworks/CFNetwork.framework/CFNetwork", arch = "arm64"
Symbol: id = {0x00000af7}, range = [0x00000001b6628fbc-0x00000001b6629020), name="-[NSHTTPCookieStorage setCookie:]"
If you're on real device try
image add '/Users/myusername/Library/Developer/Xcode/iOS DeviceSupport/12.4.1 (16G102)/Symbols/System/Library/Frameworks/CFNetwork.framework/CFNetwork'
(obviously path substitute for appropriate iOS version^)
If you're on simulator try
image add '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CFNetwork.framework/CFNetwork'
If you don't get an error then try setting your symbolic breakpoint at that point.
I added Admob Google extension in to my Game Maker 2 project, when I try to test it on xcode for iOS, I am getting the error from xcode : unable to read property list from file: ...
Tried to fiddle around with the build settings in Xcode for plist to make it XML/Binary and same as input but nothing helped.
Made sure that the extensions in game maker have IOS enabled
Tried to clean build folder
Changed Locations: of Derived data to Relative
Looked for similar problems on google and stack overflow, but nothing exactly with the same issue
Below is the code given by Gamemaker
if os_type == os_ios
{
ads_app_id = "ca-app-pub-4724502015965127~5126911475";
banner_id = "ca-app-pub-4337965814269841/5893054134";
interstitial_id = "ca-app-pub-4724502015965127/8852681295";
rewarded_id = "ca-app-pub-4724502015965127/3717109960";
}
else
{
ads_app_id = "ca-app-pub-4337965814269841~8766033395";
banner_id = "ca-app-pub-4337965814269841/5893055122";
interstitial_id = "ca-app-pub-4337965814269841/5893055258";
rewarded_id = "ca-app-pub-4337965814269841/5893055399";
}
GoogleMobileAds_Init(interstitial_id, ads_app_id);
GoogleMobileAds_LoadInterstitial();
interstitial_loaded = false;
error:
unable to read property list from file:
/Users/faisalnaamani/GameMakerStudio2/iOS/GMS2IOS/Pixel_Bricks_iOS/Pixel_Bricks_iOS/Pixel_Bricks_iOS/Supporting
Files/Pixel_Bricks_iOS-Info.plist: The operation couldn’t be
completed. (XCBUtil.PropertyListConversionError error 1.)
The error is happening at Build time
I opened the plist file with ATOM, the one generated by GameMaker Studio when I noticed xcode could not read it. I noticed a bit of code that was causing an error and when I deleted it xcode was able to build. The code is below:
<key>NSAppTransportSecurity</key>\n\r<dict>\n\r
<key>NSAllowsArbitraryLoads</key>\n\r <true/>\n\r
<key>NSAllowsArbitraryLoadsForMedia</key>\n\r <true/>\n\r
<key>NSAllowsArbitraryLoadsInWebContent</key>\n\r <true/>\n\r</dict>
But I am not sure how to fix it to make it look correct. I am afraid if I delete it somehow the code will not be correct. Does anyone have a solution? And how would I fix it from GameMaker.
As Faisal suggested, the file cannot be read if it's malformed.
Trying to open the file with Xcode helped me find the problem: a syntax error. Xcode was very explicit about where the error might be: at line 32.
After fixing the error in another IDE I was able to open the file with Xcode and build/run my app.
I am getting this error on archive:
Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc failed with exit code 1
How to solve it?
Please see the screenshot.
This problem occurs when the Swift optimization level is not set to None for Release. Set the value to None and the issue goes away.
Open up your project and click on the projects root directory.
Click the build settings tab.
Search for Swift Compiler - Code Generation and under Optimization Level make sure Release is set to None.
EDIT
After upgrading to Xcode 6.1 these instructions caused other issues when archiving (building for debug/device worked fine). Setting the optimization to Fastest allowed me to archive again. There are apparent issues with Swift compiling still (archiving specifically).
Can't archive working 6.0.1 Swift project in Xcode 6.1 / Segmentation fault: 11
EDIT
I was not able to fund the Build Settings tab, until I read this answer.
how to find the build settings tab
This occurred for me when I had two of the exact same files, and also when I was missing I file I didn't know I had deleted. I clicked on the error message, and just above the error, it shows you what file you have more than 1 of or are missing.
You can click the Product in the navigation and choose the "Clean" button; it will clean all compile error in your project. Then, you can debug for the latest error.
Deleted files reference keep in Build Phase and that's why it gives this error. Remove reference from there as well.
Project> Target > Build Phase
Under this section you will find your deleted files in red colour. Remove these files error will resolve.
I am not sure if it has one solution.
I recommend you to check the differences between your last git commit, and comment on/off the changes.
In my case, my code was
let anArray = ResultDict["ResultSet"] as [[NSDictionary : AnyObject]]
for aDict : NSDictionary in anArray {
let anObject = ObjectType(ObjectDict: aDict)
objectList.addObject(aDict)
}
no warning on the line, i got the same exit 1 compile error
then i changed it to the below it has compiled.
let anArray = ResultDict["ResultSet"] as [[NSDictionary : AnyObject]]
for aDict in anArray {
let anObject = ObjectType(ObjectDict: aDict)
objectList.addObject(aDict)
}
I don't know if this is really an answer, but...
I had the same issue. App worked when building/running, but archiving failed with "...swiftc failed with exit code 1", with no other helpful message at all. Luckily, when I tried to build my app with Nomad's ipa build, I got:
The following build commands failed:
CompileSwift normal arm64 /path/to/erroneous/TableViewController.swift
So I started commenting out sections of that file and tracked the problem down to a tuple assignment.
// MARK: - Table Data
private var tableData: [(sectionName: String, item:ListItem)] = []
private func refreshTableData() {
// let labor = ("Labor", laborListItem) // DOESN'T ARCHIVE
let labor = (sectionName: "Labor", item: laborListItem) // ARCHIVES
tableData = [labor]
tableView.reloadData()
}
So apparently the compiler wanted the elements in thast tuple named (as defined by the type of tableData).. but only for archiving? The Dumb thing is, I use this same pattern in other view controllers, and the compiler seems to be fine with those.
For the record my Code Generation -> Optimization Level was set to None for debug and release.
Hope this helps someone! It took hours to figure this out.
It happened to me when I didn't put the parenthesis at the end of a call of a function:
let var = self.getNextPrimeNumber
solved it by:
let var = self.getNextPrimeNumber()
In my case, it was caused by duplicate files, using the same name, in my project directory. As soon as I removed them, the error was gone.
This happened to me when I used static inline function from swift file
The function looks like this
static inline void openURLInSafari(NSString * _Nonnull urlString) {
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:urlString]];}
I just had the same thing occur. I hunted down the cause to one file that caused the error even when empty. Examining the file, I discovered it had the wrong character set. When I set it to UTF-8, the error vanished. I think that it was decoding it with the wrong character set.
From this I surmise that the error simply indicates that something has happened that the compiler was unprepared for. Sorry that isn't very helpful to most people, but it may help to check your characters sets.
one more case that can lead to this error which just took me hours to track down: a failable initializer that always returns nil.
i had an initializer that looked like this:
init?(object: MyObject) {
if object.importantProperty {
// initialize
}
return nil
}
when what i meant was:
init?(object: MyObject) {
if object.importantProperty {
// initialize
}
else {
return nil
}
}
fixing the initializer made the error go away.
If using Core Data:
I had a Core Data entity for which I created the NSManagedObject subclasses (with Xcode's help). In addition, the entity was configured to generate code automatically (see screenshot), so basically 2 classes existed during runtime. Just switch the option to Manual/None and it won't generate it.
This error occurred for me after I noticed that a few of my .swift files were inexplicably in the wrong directory -- one level above my Xcode project directory. When I noticed this, I moved them into the main project directory and cleaned the project, thinking everything would be fine. However, upon building the project I got the above-mentioned "failed with exit code 1" error. Just above the error message it listed the files I had just moved, indicating that it couldn't find them in the directory where they used to be. In addition to the error message, the files I moved were now showing up as red in the file navigation pane.
For each of the files in question what I did to resolve this was:
- Select the file from the list of files in the Xcode file navigation pane,
- Click on the little page icon in the rightmost pane of Xcode, which opens a file attributes pane,
- Click on the little folder icon underneath where it says "Location" in the file attributes pane,
- Choose the new location for the file,
- RESTART Xcode for the above changes to really do anything.
this error comes from missing files so the compiler couldn't find the files and keep alerting.
Follow these steps to rebuild your app:
Look up for the red and invisible files within workspace
Remove their reference
Re-add files
Re-compile
I experienced this error after performing a git merge. I solved new Xcode warnings and the project can be compiled.
Xcode 7.2.1 is used in my case.
In my way the error was due to UIDevice.currentDevice() in ((UIDevice.currentDevice().systemVersion as NSString).floatValue >= 8.0)
After commenting this all starts work fine.
XCode 7.2
in my case , at your project target Build Setttings, in Other Swift Flags，jsut delete the String "-serialize-debuggin-options"
enter image description here
I had a resolution very similar to RyanM, where with an excess of hubris I tried to assign a variable to the default value of an inner function:
Fails to compile (though does not crash SourceKit):
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
func itemCell(_ indexPath: IndexPath = indexPath) -> UITableViewCell {//...}
Succeeds:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
func itemCell(_ indexPath: IndexPath) -> UITableViewCell {//...}
One possible reason that this can happen is perhaps because you have deleted a file but not removed references to it. This will mess up the pbxproj file. I would check to see if that is the case.
check "Development Pods" Folder all listed Frameworks path.
In my case swift development snapshot was selected instead of xcode 9.2. here are the steps and image.
keep xcode on screen and click on xcode top menu bar.
Than go to toolchains option and check on xcode 9.2. thats it.
Happy Coding!!!
So, I had the above and narrowed it down to a TFS issue with locking the file but only when I pasted or did any other edits besides small copies or manual typing. I noticed the original file would compile, but my edits wouldn't, even though they were syntactic OK. Also related is unable to save document: xcode The document "..." could not be saved
The fix for both was:
Duplicate working version.
Paste fully-merged new code into duplicate.
Copy and paste old file over new one. (I personally just renamed the old one to something else, then pasted duplicate and renamed it, too. Guessing both work since I pasted directly earlier for reverts during tests to see).
Voila. Lazy way to bypass merge-locking issue. Apparently full file-pastes are just fine, while edits aren't. Shared since the other answers don't seem to be as lazy as this. ;)
Note: I am suspecting a non-UTF-8 character made its way somewhere, but pastes worked in older versions so I don't know where, or if relevant.
In my case, the error was the result of missing files that were generated by Xcode. I tried the regular clean Opt+Shift+K and it didn't clean up all the errors. I found a post on the Apple Developer site that recomended going to the Product Menu in Xcode, holding down the opt key, and selecting Clean Build Folder. This appears to be a more comprehensive build as it pops up a modal dialog for you to confirm.
Just go to the "project setting" and click on the "build phaces" after that you will find targets in that u have to delete the test file like my project name "WER" so its showing like this WER&TEST so just delete that and clean ur project and run .........
I have upgraded to Xcode 5.0. And when I run an app in debug mode and try to print an NSString value in console, it gives me the below error. Any ideas?
error: warning: couldn't get cmd pointer (substituting NULL): Couldn't load '_cmd' because its value couldn't be evaluated
Couldn't materialize struct: the variable 'stringValue' has no location, it may have been optimized out
Errored out in Execute, couldn't PrepareToExecuteJITExpression
Here is the code:
NSString *stringValue = [[self.responseArray objectAtIndex:i] valueForKey:#"merchant_name"];
The reason is stated in the error message: it may have been optimized out.. this means that you are compiling and running your code in an optimized manner.
you gotta change your compiler optimization level from Fastest,Smallest to none:
go to your target build settings
search for optimization level
change it to none (whatever mode you are in ie debugging, distribution or release)
profit
do the same for your project settings
Make sure you are in debug mode. Go Edit Scheme > Build Configuration > Debug
You might be trying to debug in the "release Scheme". Go to "Product/Scheme/Edit Scheme" and pick the "run" in the left panel. Then change the build configuration to "debug".
One alternate answer: instead of fixing "it may have been optimized out" by removing the optimization, you can stop it from being optimized by using the variable.
So, in your question, if you do something with stringValue:
NSString *stringValue = [[self.responseArray objectAtIndex:i] valueForKey:#"merchant_name"];
NSLog(#"%#", stringValue);
stringValue will no longer be optimized out because you're using it.
If you want to see all instances of optimized-out variables in your project, Use Product -> Analyze to analyze your project. Any "Dead store" warnings (in which a value is stored, and never read) will be optimized out at compile time if you have compiler optimization turned on.