Summary:
## Description
In T63516227, we're seeing a crash that occurs because `networking.methodQueue` is `nil`, and we try to `dispatch_async` to it.
## Hypothesis
This looks like a problem with NativeModule cleanup:
1. Some JS executes a call to `RCTBlobManager.addNetworkingHander`. This schedules an async method call on the `RCTBlobManager` method queue.
2. In `RCTCxxBridge invalidate`, on the JS thread, we loop through all the `RCTModuleData`s, and invalidate them. This invalidates our NativeModules (perhaps not all but only `RCTNetworking`).
3. The `RCTBlobManager.addNetworkingHander` method call finally executes, with `RCTNetworking`'s methodQueue set to nil, which throws this error.
Changelog:
[iOS][Fixed] - Fix RCTBlobManager cleanup crash
Reviewed By: PeteTheHeat
Differential Revision: D20498096
fbshipit-source-id: d2d60984637ddf883278289258aa9b2ae81bb172
Ramanpreet NaraandFacebook GitHub Bot
91c5ff4a12