App crashes with dyld[38734]: symbol not found in flat namespace '_jump_fcontext' with use_frameworks!
#39945
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louiszawadzki
added
Needs: Triage 🔍
Type: Upgrade Issue
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Needs: Repro
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Hi Luiz, can you try if this is happening also with Xcode 14? I fear that it is an Xcode 15 issue, unfortunately... |
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Uhm... I just tried and it doesn't repro for me: |
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Hi, I get the following different error in XCode 14.3.1 when building the app: Following the hint from this issue I'm able to build by removing the |
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yes, so... to run it in Xcode 14.3, you need to switch the build tool with Can you try again with Xcode 15.1? My app works with Xcode 15.1... |
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Hi! |
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@cipolleschi i have the exact same problem. and then i get this React Native info: |
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same on |
and them ⌘+R and it works. 
Can you try again? |
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@cipolleschi, I tried those steps, and I get the Here's the requested info, if it helps: $ xcodebuild -version
Xcode 15.1
Build version 15C65And the output of $ npx react-native@latest info
info Fetching system and libraries information...
System:
OS: macOS 14.2
CPU: (10) arm64 Apple M1 Max
Memory: 2.28 GB / 32.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 20.10.0
path: ~/.nvm/versions/node/v20.10.0/bin/node
Yarn:
version: 1.22.21
path: /opt/homebrew/bin/yarn
npm:
version: 10.2.5
path: ~/.nvm/versions/node/v20.10.0/bin/npm
Watchman:
version: 2023.12.04.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.14.3
path: /Users/rfontes/.rvm/gems/ruby-3.0.6/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 23.2
- iOS 17.2
- macOS 14.2
- tvOS 17.2
- watchOS 10.2
Android SDK: Not Found
IDEs:
Android Studio: 2023.1 AI-231.9392.1.2311.11076708
Xcode:
version: 15.1/15C65
path: /usr/bin/xcodebuild
Languages:
Java:
version: 11.0.21
path: /usr/bin/javac
Ruby:
version: 3.0.6
path: /Users/rfontes/.rvm/rubies/ruby-3.0.6/bin/ruby
npmPackages:
"@react-native-community/cli": Not Found
react:
installed: 18.2.0
wanted: 18.2.0
react-native:
installed: 0.73.1
wanted: 0.73.1
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: true
newArchEnabled: false |
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I managed to reproduce it. Have you tried with Xcode 15.2-beta already? |
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So, I made another test. Meanwhile, I found that |
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Hi there @cipolleschi , I keep getting the error mentioned in the issue when running on a physical device (using the Using Xcode 15.1: The output of Any ideas on how to get on this? Thank you! EDIT: managed to build & run successfully by removing |
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which version of Xcode are you using? That flag has been added by Apple because we actually asked them to give us a way to make C++'s weak symbols work with their new linker. |
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I'm actually using Xcode 15.1 (Build version 15C65). Maybe it's the case and we can remove that flag? |
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@piraces yes, I'll work on that this week or next week, worst case scenario. |
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Hi! For the record, I had the same issue as mention above:
Switching to Static Frameworks was enough 🙂 I'm available to give more info / to test other workaround, ideally I would like to go back to dynamics later! |
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Thanks for the reporting. My understanding, as of today is that:
I want to test these hypothesis, but my current connectivity foes not allow me to download 30+ Gb in a day 🤦 |
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@mateioprea It works on simulator but not on real device |
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@cipolleschi, I've attempted to target iOS 17 using Xcode 15.1, but I'm encountering the same issue on a real device: dyld[1495]: symbol not found in flat namespace '_jump_fcontext' |
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Hi everyone.
project.build_configurations.each do |config|
# fix for weak linking
self.safe_init(config, other_ld_flags_key)
- if self.is_using_xcode15_or_greater(:xcodebuild_manager => xcodebuild_manager)
+ if self.is_using_xcode15_0(:xcodebuild_manager => xcodebuild_manager)
- def self.is_using_xcode15_or_greater(xcodebuild_manager: Xcodebuild)
+ def self.is_using_xcode15_0(xcodebuild_manager: Xcodebuild)
xcodebuild_version = xcodebuild_manager.version
# The output of xcodebuild -version is something like
# Xcode 15.0
# or
# Xcode 14.3.1
# We want to capture the version digits
regex = /(\d+)\.(\d+)(?:\.(\d+))?/
if match_data = xcodebuild_version.match(regex)
major = match_data[1].to_i
+ minor = match_data[2].to_i
- return major >= 15
+ return major == 15 && minor == 0
end
return false
endWith these changes, I was able to run a 0.73 app on the device. However, the reason why we have to add the Now, I cannot install iOS 14.5 on my laptop anymore, because it is not compatible with Sonoma. Is there someone that can help out by:
The help would be much appreciated and will help the whole community! |
Summary: While developing Xcode 15, Apple reimplemented the linker. In Xcode 15.0, the linker was making old iOS (< 15) crash when they were built using Xcode 15. To fix that, we make Apple create new compiler flags (`-ld_classic`) to have a backward compatible linker. In Xcode 15.1, Apple fixed that behavior, so the flags should not be required anymore. But now, if we pass `-ld_classic` to the linker and we have an app that is using `use_framworks!`, that app crashes at startup. This change remove the flags if the Xcode that is used is 15.1 or greater. *Note:* The previous change added the flags to Hermes as well. I tested this fix in a configuration where Hermes has the flags and React Native does not, and it works. So we are removing the flags only from React Native. This Fixes facebook#39945 ## Changelog: [Internal] - Do not add the `-ld_classic` flag if the app is built with Xcode 15.1 or greater. Differential Revision: D52658197
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So, I was able to test using Firebase Test Lab and it looks like that older devices are working. I created PRs also for the supported versions: |
) Summary: While developing Xcode 15, Apple reimplemented the linker. In Xcode 15.0, the linker was making old iOS (< 15) crash when they were built using Xcode 15. To fix that, we make Apple create new compiler flags (`-ld_classic`) to have a backward compatible linker. In Xcode 15.1, Apple fixed that behavior, so the flags should not be required anymore. But now, if we pass `-ld_classic` to the linker and we have an app that is using `use_framworks!`, that app crashes at startup. This change remove the flags if the Xcode that is used is 15.1 or greater. *Note:* The previous change added the flags to Hermes as well. I tested this fix in a configuration where Hermes has the flags and React Native does not, and it works. So we are removing the flags only from React Native. This Fixes facebook#39945 ## Changelog: [Internal] - Do not add the `-ld_classic` flag if the app is built with Xcode 15.1 or greater. Reviewed By: cortinico Differential Revision: D52658197
) Summary: While developing Xcode 15, Apple reimplemented the linker. In Xcode 15.0, the linker was making old iOS (< 15) crash when they were built using Xcode 15. To fix that, we make Apple create new compiler flags (`-ld_classic`) to have a backward compatible linker. In Xcode 15.1, Apple fixed that behavior, so the flags should not be required anymore. But now, if we pass `-ld_classic` to the linker and we have an app that is using `use_framworks!`, that app crashes at startup. This change remove the flags if the Xcode that is used is 15.1 or greater. *Note:* The previous change added the flags to Hermes as well. I tested this fix in a configuration where Hermes has the flags and React Native does not, and it works. So we are removing the flags only from React Native. This Fixes facebook#39945 ## Changelog: [Internal] - Do not add the `-ld_classic` flag if the app is built with Xcode 15.1 or greater. Reviewed By: cortinico Differential Revision: D52658197
) Summary: While developing Xcode 15, Apple reimplemented the linker. In Xcode 15.0, the linker was making old iOS (< 15) crash when they were built using Xcode 15. To fix that, we make Apple create new compiler flags (`-ld_classic`) to have a backward compatible linker. In Xcode 15.1, Apple fixed that behavior, so the flags should not be required anymore. But now, if we pass `-ld_classic` to the linker and we have an app that is using `use_framworks!`, that app crashes at startup. This change remove the flags if the Xcode that is used is 15.1 or greater. *Note:* The previous change added the flags to Hermes as well. I tested this fix in a configuration where Hermes has the flags and React Native does not, and it works. So we are removing the flags only from React Native. This Fixes facebook#39945 ## Changelog: [Internal] - Do not add the `-ld_classic` flag if the app is built with Xcode 15.1 or greater. Reviewed By: cortinico Differential Revision: D52658197
) Summary: Pull Request resolved: facebook#42230 While developing Xcode 15, Apple reimplemented the linker. In Xcode 15.0, the linker was making old iOS (< 15) crash when they were built using Xcode 15. To fix that, we make Apple create new compiler flags (`-ld_classic`) to have a backward compatible linker. In Xcode 15.1, Apple fixed that behavior, so the flags should not be required anymore. But now, if we pass `-ld_classic` to the linker and we have an app that is using `use_framworks!`, that app crashes at startup. This change remove the flags if the Xcode that is used is 15.1 or greater. *Note:* The previous change added the flags to Hermes as well. I tested this fix in a configuration where Hermes has the flags and React Native does not, and it works. So we are removing the flags only from React Native. This Fixes facebook#39945 ## Changelog: [Internal] - Do not add the `-ld_classic` flag if the app is built with Xcode 15.1 or greater. Reviewed By: cortinico Differential Revision: D52658197 fbshipit-source-id: 37d6bc895921c0fc3661f301870477191e7e42b3
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Hey @cipolleschi, I hate that this is coming back up but I am having this problem with
And system Our app is rather large and has a mix of dynamic and static frameworks. I also tried manually removing all the |
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same problem here with [email protected] and react-native 0.73.6 just npx react-native@latest init AwesomeProjectTest
USE_FRAMEWORKS=dynamic NO_FLIPPER=1 pod installSystem: |
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Same for me, were you able to find a fix? |
1 similar comment
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Same for me, were you able to find a fix? |
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Hi everyone, I was on a long PTO (3 weeks) and came back this week. |
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@sunzongzheng @wkwyatt I just tried the following steps: Build: ⌘+B I'm using React Native 0.73.6 and Xcode 15.3. I think that there is something funky in your local setups, perhaps caching. Could you try to:
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Are you running it on a device later? Because my issue is not compiling/building but if I run it on a physical device |
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No I was only building. I'll try to connect a device, then. |
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I'm very sad. This is an Xcode regression.
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Some good and bad news here. The good news are that:
The reason why 0.74 is not affected even with Dynamic Frameworks is the following:
The bad news is that, even by re-enabling the @bruno-centanaro @sunzongzheng how critical is the dynamic framework setup for you? Would your app work also with the static framework setup? |
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Thanks for the update. Dynamic frameworks is a must for my app but installing xcode 15.1 does the job so I guess I'll need to instruct my team to change it manually. Thanks again |
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I'm really sorry for this as I hoped we fixed this for good. :( |
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I just disabled Hermes on iOS in Podfile and it helped. |
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yeah, that's another workaround. The problem is that React-Hermes depends on a subpod of Folly which depends on the |
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Dynamic frameworks are not critical in my app, so let's get back to the good old static 🐢 🐢 Thanks for looking into this! Got really confused to have the crash back when upgrading to XCode 15.3 🥲 |
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same here, any update on this?
Xcode: SDKs: CocoaPods: |
update: after downgrade Xcode to 15.2, this error gone (Xcode 15.3 not work either) |
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Has anyone tried with Xcode 15.4 already? (haven't had the time yet!) |
yes , see my commont above, i already tried Xcode 15.4 |
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Problem was solved on 0.74.x
now everything works! |
New Version
0.73.0-rc.1
Old Version
0.72.5
Build Target(s)
iOS simulator
Output of
react-native infoIssue and Reproduction Steps
npx react-native@latest init MyApp --version 0.73.0-rc.1(cd ios && USE_FRAMEWORKS=dynamic pod install)The app crashes immediately with the following error:
XCode screenshot:
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