patch2

gistfile1.txt

diff --git a/Sources/Foundation/NSTimeZone.swift b/Sources/Foundation/NSTimeZone.swift
index 8f710d62..67eeed3e 100644
--- a/Sources/Foundation/NSTimeZone.swift
+++ b/Sources/Foundation/NSTimeZone.swift
@@ -95,10 +95,13 @@ open class NSTimeZone : NSObject, NSCopying, NSSecureCoding, NSCoding {
     
     public convenience init?(abbreviation: String) {
         let abbr = abbreviation._cfObject
-        guard let name = unsafeBitCast(CFDictionaryGetValue(CFTimeZoneCopyAbbreviationDictionary(), unsafeBitCast(abbr, to: UnsafeRawPointer.self)), to: NSString?.self) else {
-            return nil
+        let nsname = withExtendedLifetime(abbr) { _ -> NSString? in
+            return unsafeBitCast(CFDictionaryGetValue(CFTimeZoneCopyAbbreviationDictionary(), unsafeBitCast(abbr, to: UnsafeRawPointer.self)), to: NSString?.self)
+        }
+        if let name = nsname?._swiftObject {
+            self.init(name: name, data: nil)
         }
-        self.init(name: name._swiftObject , data: nil)
+        return nil
     }
 
     open func encode(with aCoder: NSCoder) {