Preview Canvas does not work

Question

bergersilvio OP

Created Dec ’21

Replies 7

Boosts 0

Views 7.1k

Participants 14

My Preview Canvas does not work anymore.

I already uninstalled and freshly reinstalled Xcode (App Store Version and direct download from developer.apple.com, version 13.2 with Big Sur and now updated to Monterey 12.1). I uninstalled Xcode using AppCleaner and also by clearing the clang/cache folders, as well as Lib/Dev... etc. manually, but the same error comes up over and over again.

When I run the code directly (via Run/Simulator instead of Preview/Canvas) the app shows up and works just fine.

I open Xcode, I create a new project for iOS, I resume the preview and it fails with the attached error...

Preview Canvas Diagnostics

file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/RuntimeStubs.h' has been modified since the module file '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed

----------------------------------------

CompileDylibError: Failed to build ContentView.swift

Compiling failed: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/RuntimeStubs.h' has been modified since the module file '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed

<unknown>:0: error: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/RuntimeStubs.h' has been modified since the module file '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed
<unknown>:0: note: please rebuild precompiled header '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm'
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "LibcOverlayShims.h"
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/LibcOverlayShims.h:21:2: error: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/RuntimeStubs.h' has been modified since the module file '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed
#include "Visibility.h"
 ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/LibcOverlayShims.h:21:2: note: please rebuild precompiled header '/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/SwiftShims-2TTN5UXQBRCCQ.pcm'
#include "Visibility.h"
 ^
<unknown>:0: error: missing required module 'SwiftOverlayShims'


==================================

|  BuildInvocationError
|  
|  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -F /Applications/Xcode.app/Contents/SharedFrameworks-iphonesimulator -enforce-exclusivity=checked -DDEBUG -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk -target x86_64-apple-ios15.2-simulator -Xfrontend -serialize-debugging-options -enable-testing -swift-version 5 -I /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Products/Debug-iphonesimulator -F /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Products/Debug-iphonesimulator -emit-localized-strings -emit-localized-strings-path /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/Objects-normal/x86_64 -c -j8 -serialize-diagnostics -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/testestest-generated-files.hmap -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/testestest-own-target-headers.hmap -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/testestest-all-target-headers.hmap -Xcc -iquote -Xcc /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/testestest-project-headers.hmap -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Products/Debug-iphonesimulator/include -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/DerivedSources-normal/x86_64 -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/DerivedSources/x86_64 -Xcc -I/Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/DerivedSources -Xcc -DDEBUG=1 -working-directory /Users/bergersilvio/SynologyDrive/021_Apps/Swift/testestest /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/Objects-normal/x86_64/ContentView.1.preview-thunk.swift -o /Users/bergersilvio/Library/Developer/Xcode/DerivedData/testestest-bsifesglpnsjuzelmwqyilaafjkw/Build/Intermediates.noindex/Previews/testestest/Intermediates.noindex/testestest.build/Debug-iphonesimulator/testestest.build/Objects-normal/x86_64/ContentView.1.preview-thunk.o -module-name testestest_PreviewReplacement_ContentView_1 -Onone -Xfrontend -disable-modules-validate-system-headers -gline-tables-only

Any help would be greatly appreciated as at the moment, I don't have a running development environment unfortunately...

Thanks in advance.

Best regards Silvio

Answered by seamount in 698492022

This fixed it for me:

Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
Run a build in the simulator
Preview now works (for me at least)

Hope this works for you.

Boost

Answer 1

seamount OP

Dec ’21

Same problem here.

0

Answer 2

seamount OP

Dec ’21

Accepted Answer

This fixed it for me:

Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
Run a build in the simulator
Preview now works (for me at least)

Hope this works for you.

17

Answer 3

holgerflick OP

Dec ’21

Also using 13.2.1 helps ... but that version then has other issues.

0

Answer 4

snackdog OP

Dec ’21

I had that error for a while and removing the cache helped but then I got a new error:

MessageSendFailure: Message send failure for update

==================================

| RemoteHumanReadableError: The operation couldn’t be completed. XPC error received on message reply handler

|

| BSServiceConnectionErrorDomain (3):

| ==NSLocalizedFailureReason: XPC error received on message reply handler

| ==BSErrorCodeDescription: OperationFailed

0

Answer 5

snackdog OP

Dec ’21

It seems my error is only occurring with the SwiftUI view has an @FocusState variable.

0

Answer 6

AdvaitaSinha OP

Dec ’21

Sometimes Commmand + Shift + K, which is clean also works. It solved it for me. Worth mentioning

0

Answer 7

Wovoka OP

Jun ’22

Thanks, I was encountering the same error from the recent upgrade, and COMMAND + SHIFT + K restored my preview.

0