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Workaround for https://github.com/apple/swift/issues/73532 #4951

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Workaround for https://github.com/apple/swift/issues/73532 #4951

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8 changes: 8 additions & 0 deletions CoreFoundation/RunLoop.subproj/CFSocket.c
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Expand Up @@ -561,6 +561,14 @@ static void __CFSocketInitializeSockets(void) {
__CFReadSockets = CFArrayCreateMutable(kCFAllocatorSystemDefault, 0, NULL);
__CFWriteSocketsFds = CFDataCreateMutable(kCFAllocatorSystemDefault, 0);
__CFReadSocketsFds = CFDataCreateMutable(kCFAllocatorSystemDefault, 0);
#if TARGET_OS_WIN32
// A workraround for a compiler hang issue on windows:
// https://github.com/apple/swift/issues/73532
// Use a larger initial size so that the bit vector resize code is
// less likely used as Windows socket FD numbers are usually
// within 4 digits.
CFDataIncreaseLength(__CFReadSocketsFds, 16348 / NBBY);
#endif
zeroLengthData = CFDataCreateMutable(kCFAllocatorSystemDefault, 0);
#if TARGET_OS_WIN32
__CFSocketInitializeWinSock_Guts();
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