RCTWebSocket.m (2 issues)

[ozguruksal]

XCode version 7.3.1 is fine but if I use version 8.2(beta) instead, then the XCode reports two issues:

1. /pathTo/myProject/node_modules/react-native/Libraries/WebSocket/RCTSRWebSocket.m:494:3: Ignoring return value of function declared with warn_unused_result attribute
2. /pathTo/myProject/node_modules/react-native/Libraries/WebSocket/RCTSRWebSocket.m:1334:5: Ignoring return value of function declared with warn_unused_result attribute

If I comment out the following two lines from "RCTWebSocket.m", the build succeeds:
SecRandomCopyBytes(kSecRandomDefault, keyBytes.length, keyBytes.mutableBytes);
SecRandomCopyBytes(kSecRandomDefault, sizeof(uint32_t), (uint8_t *)mask_key);

[zhileichen]

Specifically, it caused by the llvm compiler flag -Werror, means turn warnings into errors, which might start work in later llvm 8.0, you can removed it in the build settings of RCTWebSocket target.

[TimBroddin]

I posted a fix here:
#8584

[javache]

Fixed by 2f78852