I tried to execute my app in the iOS Simulator. The build succeeded, but I got an alert with an error message before running and the app did not execute:
Pseudo Terminal Setup Error
ErrorCode: 1 Errno: 6
What is this and how can I fix this?
Just restart Xcode and run your app again.
A pseudo terminal is an emulated terminal which is controlled by a master application, in this case, Xcode. For some reason, it encountered an error while trying to run that emulated terminal.
A common problem that can cause this is that you tried to run an instance of an iOS application too quickly after stopping another instance.
How to resolve the error:
Quit the simulator
Restart Xcode - (Make sure that you have saved /committed any changes you have made to your code)
I can't post comment, that is why I wrote here. To those for who this issue repeats even after restarting Xcode, remember to kill process at all, don't just close the project.
Related
I have recently upgraded the Mac OS to Ventura 13.2.1 and Xcode to 14.2, now once I try to compile any application with Xcode, I am getting Kill:9 related issue for random task/framework in the project. I also get Kill:9 issue sometime on terminal as well.
Listing the errors here:
failed to read asset tags: The command `` terminated with uncaught signal 9. The command had no output.
Driver threw jobFailedWithNonzeroExitCode(9, "") without emitting errors.
Unable to execute command: Killed 9 Clang frontend command failed due to signal.
Please help me to resolve this issue/crash.
Open project in Xcode.
Build the app with Simulator (I tried with iPhone 14 Pro)
Error occurs in the build
Ideally project should have compiled without any error.
It sounds to me that the problem is with the installation of Xcode because when an unprivileged task is attempted, the OS will kill it off (with signal 9).
What I recommend is for you to re-install Xcode.
When you first run the new Xcode, it should prompt you for an administrator password in order to install system related components. Make sure you do this step. Hopefully that should then allow you to compile and run your iOS apps.
While debugging any iOS application, Xcode builds and run successfully, also launches a simulator but it is not able to attach debugger from Xcode 14 to Simulator iOS app.
It throws an error in Xcode:
Xcode console says:
Could not attach to pid : “75997” Domain: IDEDebugSessionErrorDomain
Code: 3 Failure Reason: attach failed (Not allowed to attach to
process. Look in the console messages (Console.app), near the
debugserver entries, when the attach failed. The subsystem that
denied the attach permission will likely have logged an informative
message about why it was denied.) User Info: {
DVTRadarComponentKey = 855031;
IDERunOperationFailingWorker = DBGLLDBLauncher;
RawUnderlyingErrorMessage = "attach failed (Not allowed to attach to process. Look in the console messages (Console.app), near the
debugserver entries, when the attach failed. The subsystem that
denied the attach permission will likely have logged an informative
message about why it was denied.)"; }
Tried with re-installing Xcode and Command line tools, but issue persists.
Steps:
Build and run app with Debug executables true
Simulator gets launched
Error on Xcode and it gets disconnected from simulator
Is there a possibility that it can be blocked by any other app, if so how to identify ?
I solved the issue by doing the steps below:
SOLUTION 1:
Edit the scheme
Select Run
Select Build Configuration "Debug"
Select "Wait for the executable to be launched"
Close
Run the app
see the screenshot here
You will receive an error message when you run the app again.
Close the app.
Edit the scheme again and change "Wait for the executable to be launched" to "Automatically".
Now your simulator will work as expected.
SOLUTION 2:
Delete your app folder in Derived Data
/Users/[your username]/Library/Developer/Xcode/DerivedData/
Search your app name folders and delete them.
SOLUTION 3:
Open the terminal and run:
sudo DevToolsSecurity -enable
This command enables the Developer Mode. After running the command you will receive this message: [Developer mode is now enabled].
Sometimes it's happen, when you are trying to build too fast after a build has started.
First of all, quit your current simulator, delete derived data and clean the project, wait until whole processing is complete. Then do some changes / editing if required (as we clean all data) and try running on a different simulator.
Check certificates in key-chain access, if you found any untrusted certificates in key-chain access remove it.
Also if you are using beta version just make sure it is downloaded from Apple official website.
Came here to share my (strange) solution if anybody crosses the same problem with no answers working. In my case, no solution from this nor other SO answers to similar questions worked (cleaning, rebuilding project, updating, clearing derived data..)
My setup is:
Macbook M1 2022 + Xcode Version 14.2 (14C18)
This Xcode version could not attach to any of my apps (fresh new or previously developed) on different simulators (11, 12, 14) with iOS versions 13.7 - 16.2.
Editing scheme solution from answer above was not working also so I ended up in leaving scheme as:
Build configuration: Release
Debug executable Deselected(!)
Launch Automatically
And magically debugging app in Xcode started working even though it's release version with debug option deselected.. Selecting Debug executable again makes Xcode not possible in attaching to app process
Just to clarify: above steps actually makes app to run as in DEBUG mode - Xcode attaches to pid, I can do console logs and breakpoints. This Xcode version behaves opposite than options selected
Xcode 9.2 debugging on an iOS Simulator has completely broken for me.
I worked on this for hours and tried a ton of suggestions short of completely wiping my hard drive and starting out with a fresh operating system install. I ended up filing a bug with Apple. Posting here in case anyone has encountered this problem and has any suggestions.
Summary:
When try to build and run in debug mode with a debug executable. The simulator only opens the application to a white screen and then Xcode pops up an error:
Could not attach to pid: "<a process id>"
Ensure "<app>" is not already running, and "<user>" has permission to debug it.
Steps to Reproduce:
Make any project and try to run on any simulator.
Expected Results:
Debugger successfully attaches to debugger.
Actual Results:
Debugger is never able to attach to the iOS simulator process/app for debugging.
Debugger CAN attach and build and run successfully on a physical device.
Version/Build:
- Xcode Version 9.2 (9C40b)
- macOS Sierra 10.12.6
- Any iOS project
- Any iOS simulator
Other notes:
- Xcode 9.2 was working fine until this problem randomly started. The error initially said:
Failed to initiate service connection to simulator
DTServiceHubClient failed to bless service hub for
simulator iPhone 8 Plus <simulator identifier>
- After rebooting computer, the error shifted to "Could not attached to pid..."
I tried dozens of suggested solutions short of completely wiping my computer including:
Resetting device contents and settings on simulators
Create a new device (even different device and OS combinations)
Try different Xcode projects, even simple one-off single view applications
Looking at the etc/hosts file and verifying localhost can be pinged
Restarting computer multiple times
Deleting out derived data (multiple times)
Let it build and run without attaching debugger, then try to attach debugger by "attach to process id"
Completely uninstalling Xcode and all simulators, and reinstalling.
Removing any invalid certificates in keychain
It turns out our security software was blocking the debugger. Running sudo sysdiagnose helped me find a log entry showing that it was being blocked. The software is Cb Defense (Carbon Black Defense). Apparently the only workaround is for your security team to whitelist by a hash, and that hash could change in the future.
There is a bug in Xcode 9.0-9.2 that causes this issue to appear after running for a while. If you log out and back in it should resolve it for you.
I upgrade my xcode after update in xcode_8 I have faced many issues like app not running in simulator as well as some time not run in device .It gives me an error App installation failed.An unknown error has occoured. Out of five three time run on device and 2 time not run and provisioning profile is correct because app run in device.
In simulator it gives an exception of slidemenu franework.
Code totally update with xcode_8 and swift 2.3.
Tried everything, described above, the only thing that fixed this was to restart my Mac, it then started working again.
Clean the derived data, then run again.
I'm trying to run a sample app; its source can be found here: https://github.com/bandwidthcom/catapult-reference-app-voice-ios
In commit c669271, before the app was migrated to Xcode 8 and Swift 3, I was able to run it in devices from Xcode 7 - the Simulator wasn't working since one of its dependencies wasn't built for x86_64.
But since it was updated, when I try to run the application on a Simulator from Xcode 8, I get the following error:
The operation couldn’t be completed. (Mach error -308 - (ipc/mig) server died)
There's a similar error when running on a device, but since I don't have one with me right now, I'll edit this question with further details tomorrow.
I saw it working thrice. The only thing that comes to mind is that I had a clean install of Xcode each time it worked. After something like a reboot, or just a restart of Xcode, I wasn't able to run it anymore.
I don't have a firewall enabled, so the accepted answer to this question (Swift Playground and Simulator Error (ipc/mig) server died, Unable to boot the iOS Simulator) doesn't solve my problem.
Any ideas?
OBS: You have to edit the Config.swift file to be able to build the project: any value in the place of "<replace me>" will suffice.
It seems the problem was related to a framework that was being embedded in the application via symlink.
I changed one of the build scripts to copy the framework and now everything is working as expected.
Not sure why it worked before, but that seems to be the answer!