Reloading Via React Native Debug Menu Causes Crash when Realm is installed

Description

Looks like another incarnation of https://github.com/software-mansion/react-native-reanimated/issues/1285 Was happening on my project when tried to add reanimated 2 (just plainly calling <Animated.View />). I’ve tracked it down to a possible conflict with another dependancy: realmjs. Below are the steps to reproduce it from reanimated 2 playground

Screenshots

Steps To Reproduce

1. checkout reanimated 2 playground
2. upgrade react native to 0.63.3
3. add realm: yarn add realm
4. npx pod-install
5. run in simulator and try to refresh with cmd+R

Package versions

• React: 16.13.1
• React Native: 0.63.3
• React Native Reanimated: 2.0.0-alpha.8
• NodeJS: v14.9.0

[mattijsf]

We’re in the process of removing realm-js, mainly due to lack of Hermes support and this is another…

These lines are causing the crash:

JSCRuntime::~JSCRuntime() {
  // On shutting down and cleaning up: when JSC is actually torn down,
  // it calls JSC::Heap::lastChanceToFinalize internally which
  // finalizes anything left over.  But at this point,
  // JSValueUnprotect() can no longer be called.  We use an
  // atomic<bool> to avoid unsafe unprotects happening after shutdown
  // has started.
  ctxInvalid_ = true;
  JSGlobalContextRelease(ctx_);
#ifndef NDEBUG
  assert(
      objectCounter_ == 0 && "JSCRuntime destroyed with a dangling API object");
  assert(
      stringCounter_ == 0 && "JSCRuntime destroyed with a dangling API string");
#endif
}

I guess both modules are tinkering somewhat with JSI and are causing this problem.

I’ve added the following lines to Podfile to prevent the app from crashing upon reload (in our case temporarily). Should be used with care though! As obviously something is going wrong on either Realm or Reanimated v2’s side and this error hints towards a memory issue/leak. The NDEBUG flag within the Realm-jsi module is only used for reference counting.

installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
        if target.name == "React-jsi"
          puts "*** Patching React-jsi pod..."
          puts "***"
          puts "*** - Adding NDEBUG=1 to silence the 'JSCRuntime destroyed with a dangling API object' crash upon reload"
          puts "***"
          puts "*** This is cause by realm-js and reanimated v2 being loaded both at runtime."
          puts "*** It's recommended to remove realmjs as it is also incompatible with Hermes."
          puts "*** After which this workaround can be removed from Podfile."
          puts "*** Done"
          config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)']
          config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] << 'NDEBUG=1'
        end
      end
    end

[enigmablue]

Have the same problem, is there any workaround or planned fix for this? Thanks.