After update to Xcode 7.3, App crashes before main() is executed

Originator:cruinh
Number:rdar://25363084 Date Originated:3-25-2016
Status:Open Resolved:
Product:Developer Tools Product Version:7.3
Classification: Reproducible:Always
 
Our existing app, which was running in Xcode 7.2.1 now crashes before any of its code gets executed, specifically when connecting a physical iPhone to the computer, and debugging the code on that device.  

The project is very large and makes use of both objective-c Cocoapods and Swift dynamic frameworks.

Result of lldb "thread backtrace" command:

thread #2: tid = 0x525f0, 0x00000001940784c8 libobjc.A.dylib`realizeClass(objc_class*​) + 1036, queue = 'gputools.DYKeyedUnarchiver.0x103f62178', stop reason = EXC_BAD_ACCESS (code=2, address=0x101e49790)
 ​* frame #0: 0x00000001940784c8 libobjc.A.dylib`realizeClass(objc_class*​) + 1036
   frame #1: 0x0000000194078b04 libobjc.A.dylib`realizeAllClasses() + 96
   frame #2: 0x000000019407b76c libobjc.A.dylib`objc_copyClassList + 152
   frame #3: 0x0000000103f31728 GPUToolsCore`dy_copy_subclasses + 224
   frame #4: 0x0000000103f31a30 GPUToolsCore`__54+[DYKeyedUnarchiver addPermanentlyAllowedBaseClasses:]_block_invoke11 + 232
   frame #5: 0x0000000103ec8fd4 libdispatch.dylib`_dispatch_call_block_and_release + 24
   frame #6: 0x0000000103ec8f94 libdispatch.dylib`_dispatch_client_callout + 16
   frame #7: 0x0000000103ed3db8 libdispatch.dylib`_dispatch_queue_drain + 780
   frame #8: 0x0000000103ecc2c4 libdispatch.dylib`_dispatch_queue_invoke + 132
   frame #9: 0x0000000103ed65d4 libdispatch.dylib`_dispatch_root_queue_drain + 772
   frame #10: 0x0000000103ed8248 libdispatch.dylib`_dispatch_worker_thread3 + 132
   frame #11: 0x00000001948d121c libsystem_pthread.dylib`_pthread_wqthread + 816
   frame #12: 0x00000001948d0ee0 libsystem_pthread.dylib`start_wqthread + 4

Steps to Reproduce:
1. Open project
2. Connect iPhone running iOS 9.3 (seen happening with iPhone 6, 6 Plus and 6s)
3. Select a scheme for a development build
4. Select the device to run on
5. Click the Run button


Expected Results:
App should launch normally

Actual Results:
App crashes as described above

Version:
Xcode 7.3
OSX 10.11.4

Notes:
We are unable to provide a copy of the crashing Xcode project at this time, but wanted to provide what information we can.

Configuration:
Seen happening in multiple situations when using Xcode 7.3.  iOS device was either a iPhone 6 (iOS 9.3), iPhone 6 Plus (iOS 8), or iPhone 6s (iOS 9.3)

Comments

Apple may be working on a fix...

This seems to be related:
https://bugs.swift.org/browse/SR-1055

By cruinh at March 29, 2016, 3:33 p.m. (reply...)

Same happening with me also. It runs fine in simulator with iOS 9.3 but crashes on device.

By arsi.mpa at March 27, 2016, 1:14 p.m. (reply...)

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