# Why

fixed #26044
close ENG-11034

# How

we need to enable hermes debugging feature even on expo-go release
build. previously we did this when generating versioned hermes. since we
now use unversioned variant to serve sdk 50, we should change our way to
enable the hermes debugging feature.

this pr with expo/react-native#33 are to enable
the `HERMES_ENABLE_DEBUGGER` for all variants
note that: this pr would also increase ios build time because we now
building hermes from source.

fixed #26044
close ENG-11034

we need to enable hermes debugging feature even on expo-go release
build. previously we did this when generating versioned hermes. since we
now use unversioned variant to serve sdk 50, we should change our way to
enable the hermes debugging feature.

this pr with expo/react-native#33 are to enable
the `HERMES_ENABLE_DEBUGGER` for all variants
note that: this pr would also increase ios build time because we now
building hermes from source.

…tion for existing view (facebook#51294)

Summary:
Pull Request resolved: facebook#51294

changelog: [internal]

Fix a crash where a node that is supposed to be culled doesn't get visited because culling context is not updated.
The differentiator would generate a create instruction for a view that already exists.

Stack trace for the crash:
```
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
  * frame #0: 0x0000000111740874 libsystem_kernel.dylib`__pthread_kill + 8
    frame #1: 0x00000001117aa2ec libsystem_pthread.dylib`pthread_kill + 264
    frame #2: 0x0000000180171ea8 libsystem_c.dylib`abort + 100
    frame #3: 0x00000001802b0144 libc++abi.dylib`abort_message + 128
    frame #4: 0x000000018029fe4c libc++abi.dylib`demangling_terminate_handler() + 296
    frame #5: 0x000000018006f220 libobjc.A.dylib`_objc_terminate() + 124
    frame #6: 0x00000001375d1964 INFRAFramework`meta_terminate() + 5468
    frame #7: 0x00000001802af570 libc++abi.dylib`std::__terminate(void (*)()) + 12
    frame #8: 0x00000001802b2498 libc++abi.dylib`__cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 32
    frame #9: 0x00000001802b2478 libc++abi.dylib`__cxa_throw + 88
    frame #10: 0x0000000180093904 libobjc.A.dylib`objc_exception_throw + 384
    frame #11: 0x0000000180e6999c Foundation`-[NSAssertionHandler handleFailureInFunction:file:lineNumber:description:] + 268
    frame #12: 0x000000031a3bcfc8 XPLAT_6_Framework`-[RCTComponentViewRegistry dequeueComponentViewWithComponentHandle:tag:] + 528
    frame #13: 0x000000031a3ccdec XPLAT_6_Framework`RCTPerformMountInstructions(std::__1::vector<facebook::react::ShadowViewMutation, std::__1::allocator<facebook::react::ShadowViewMutation>> const&, RCTComponentViewRegistry*, RCTMountingTransactionObserverCoordinator&, int) + 356
    frame #14: 0x000000031a3ccc7c XPLAT_6_Framework`-[RCTMountingManager performTransaction:]::$_1::operator()(facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&) const + 80
    frame #15: 0x000000031a3ccc20 XPLAT_6_Framework`decltype(std::declval<-[RCTMountingManager performTransaction:]::$_1&>()(std::declval<facebook::react::MountingTransaction const&>(), std::declval<facebook::react::SurfaceTelemetry const&>())) std::__1::__invoke[abi:ne190102]<-[RCTMountingManager performTransaction:]::$_1&, facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&>(-[RCTMountingManager performTransaction:]::$_1&, facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&) + 40
    frame #16: 0x000000031a3ccbc8 XPLAT_6_Framework`void std::__1::__invoke_void_return_wrapper<void, true>::__call[abi:ne190102]<-[RCTMountingManager performTransaction:]::$_1&, facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&>(-[RCTMountingManager performTransaction:]::$_1&, facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&) + 40
    frame #17: 0x000000031a3ccb94 XPLAT_6_Framework`std::__1::__function::__alloc_func<-[RCTMountingManager performTransaction:]::$_1, std::__1::allocator<-[RCTMountingManager performTransaction:]::$_1>, void (facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&)>::operator()[abi:ne190102](facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&) + 44
    frame #18: 0x000000031a3cba1c XPLAT_6_Framework`std::__1::__function::__func<-[RCTMountingManager performTransaction:]::$_1, std::__1::allocator<-[RCTMountingManager performTransaction:]::$_1>, void (facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&)>::operator()(facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&) + 44
    frame #20: 0x000000032f219804 XPLAT_1_Framework`std::__1::function<void (facebook::react::MountingTransaction const&, facebook::react::SurfaceTelemetry const&)>::operator()(this=0x000000016d4f0c78, __arg=0x000000016d4f0a10, __arg=0x000000016d4f0978) const at function.h:989:10
    frame #21: 0x000000032f219668 XPLAT_1_Framework`facebook::react::TelemetryController::pullTransaction(this=0x00000003f4680f00, willMount=0x000000016d4f0c98, doMount=0x000000016d4f0c78, didMount=0x000000016d4f0c58) const at TelemetryController.cpp:39:3
    frame #22: 0x000000031a3c5b28 XPLAT_6_Framework`-[RCTMountingManager performTransaction:] + 544
    frame #23: 0x000000031a3c5864 XPLAT_6_Framework`-[RCTMountingManager initiateTransaction:] + 456
    frame #24: 0x000000031a3c5240 XPLAT_6_Framework`__42-[RCTMountingManager scheduleTransaction:]_block_invoke + 308
    frame #25: 0x0000000131f81b84 BOTTOMFramework`__RCTExecuteOnMainQueue_block_invoke + 40
    frame #26: 0x000000018017c788 libdispatch.dylib`_dispatch_call_block_and_release + 24
    frame #27: 0x0000000180197278 libdispatch.dylib`_dispatch_client_callout + 12
    frame #28: 0x00000001801b2fcc libdispatch.dylib`_dispatch_main_queue_drain.cold.7 + 24
    frame #29: 0x000000018018c1c4 libdispatch.dylib`_dispatch_main_queue_drain + 1184
    frame #30: 0x000000018018bd14 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 40
    frame #31: 0x0000000180427fec CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
    frame #32: 0x00000001804229f8 CoreFoundation`__CFRunLoopRun + 1920
    frame #33: 0x0000000180421e3c CoreFoundation`CFRunLoopRunSpecific + 536
    frame #34: 0x0000000190f62d00 GraphicsServices`GSEventRunModal + 164
    frame #35: 0x0000000185bcec98 UIKitCore`-[UIApplication _run] + 796
    frame #36: 0x0000000185bd3064 UIKitCore`UIApplicationMain + 124
    frame #37: 0x0000000115fbf0bc PRODUCTFramework`main + 200
    frame #38: 0x00000001114293d8 dyld_sim`start_sim + 20
    frame #39: 0x0000000111506b4c dyld`start + 6000
```

Reviewed By: rubennorte

Differential Revision: D74654157

fbshipit-source-id: 9181bcd28524c71d0ca4620bd630dc0baa172386