ios - Fast Enumeration with NSMutableDictionary -

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i found weird issue 64 bit platform, when tried enumerate nsmutabledictionary.i have code follows,

nsmutabledictionary *dictionary = [nsmutabledictionary dictionary]; nsarray *expectedkeysarray = [nsarray arraywithobjects:@"k1", @"k2", @"k3", @"k4", @"k5", nil]; nsarray *expectedvaluesarray = [nsarray arraywithobjects:@"v1", @"v2", @"v3", @"v4", @"v5", nil]; (int = 0; < [expectedkeysarray count]; i++) {     [dictionary setobject:[expectedvaluesarray objectatindex:i]                         forkey:[expectedkeysarray objectatindex:i]]; }  (nsstring *key in dictionary) {     nslog(@"key %@",key);  }

when ran above code in 32 bit simulator,line within loop 

 nslog(@"key %@",key);

is getting executed , fast enumeration works fine.but when run above code in 64 bit simulator, doesn't enter loop , fast enumeration doesn't work.did face similar issue?.i'm using xcode 5.1,with ios 7.1


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