Consider the backtrace of your crashing thread:
Thread 7 Crashed:: com.facebook.react.JavaScript
0 libsystem_kernel.dylib … __pthread_kill + 8
1 libsystem_pthread.dylib … pthread_kill + 288
2 libsystem_c.dylib … abort + 180
3 libsystem_c.dylib … __assert_rtn + 272
4 developerszone … 0x100a50000 + 790368
5 developerszone … 0x100a50000 + 825676
6 developerszone … 0x100a50000 + 2226968
7 hermes … 0x1012e0000 + 78300
8 hermes … 0x1012e0000 + 159792
9 hermes … 0x1012e0000 + 287328
10 hermes … 0x1012e0000 + 284444
11 hermes … 0x1012e0000 + 566852
12 hermes … 0x1012e0000 + 26000
13 hermes … facebook::hermes::HermesRuntime::evaluateJavaScriptWithSourceMap(std::__1::shared_ptr<facebook::jsi::Buffer const> const&, std::__1::shared_ptr<facebook::jsi::Buffer const> const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&) + 88
14 hermes … 0x1012e0000 + 30456
15 developerszone … 0x100a50000 + 2216184
16 developerszone … 0x100a50000 + 2410136
17 developerszone … 0x100a50000 + 2034448
18 developerszone … 0x100a50000 + 2038116
19 developerszone … 0x100a50000 + 1362924
20 developerszone … 0x100a50000 + 1411692
21 developerszone … 0x100a50000 + 1411140
22 CoreFoundation … __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 28
23 CoreFoundation … __CFRunLoopDoBlocks + 364
24 CoreFoundation … __CFRunLoopRun + 2432
25 CoreFoundation … CFRunLoopRunSpecific + 612
26 developerszone … 0x100a50000 + 1321268
27 Foundation … __NSThread__start__ + 716
28 libsystem_pthread.dylib … _pthread_start + 148
29 libsystem_pthread.dylib … thread_start + 8
Frame 4 has tripped an assert that’s crashed the process. It’s hard to say why because very few of these frames are symbolicated. You may be able to symbolicate them using the techniques described in Adding Identifiable Symbol Names to a Crash Report but, even if you do, there’s no guarantee that’ll help because you’re deep in your third-party language runtime. So, if symbolication doesn’t help, I recommend that you escalate this via the support chanel for that runtime.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"