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[ios] Fix crash when enabling Performance Monitor on iOS 13.4 #21

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Merged
merged 1 commit into from
Mar 31, 2020
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[ios] Fix crash when enabling Performance Monitor on iOS 13.4 #21

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8 changes: 8 additions & 0 deletions React/Profiler/RCTPerfMonitor.m
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,14 @@ static BOOL RCTJSCSetOption(const char *option)
static RCTJSCSetOptionType setOption;
static dispatch_once_t onceToken;

// As of iOS 13.4, it is no longer possible to change the JavaScriptCore
// options at runtime. The options are protected and will cause an
// exception when you try to change them after the VM has been initialized.
// https://github.com/facebook/react-native/issues/28414
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So sad 😢

if (@available(iOS 13.4, *)) {
return NO;
}

dispatch_once(&onceToken, ^{
/**
* JSC private C++ static method to toggle options at runtime
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