Index: iOS/SiteStorage.swift
==================================================================
--- iOS/SiteStorage.swift
+++ iOS/SiteStorage.swift
@@ -77,29 +77,26 @@
     }
 
     func length(forSite name: OFString) -> size_t {
         guard let site = storage[name] else {
             OFInvalidArgumentException().throw()
-            abort()
         }
 
         return (site[SiteStorage.lengthField] as! OFNumber).sizeValue
     }
 
     func isLegacy(site name: OFString) -> Bool {
         guard let site = storage[name] else {
             OFInvalidArgumentException().throw()
-            abort()
         }
 
         return (site[SiteStorage.legacyField] as! OFNumber).boolValue
     }
 
     func keyFile(forSite name: OFString) -> OFString? {
         guard let site = storage[name] else {
             OFInvalidArgumentException().throw()
-            abort()
         }
 
         let keyFile = site[SiteStorage.keyFileField]
         if keyFile is OFNull {
             return nil