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Re: Collection was mutated while being enumerated
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Re: Collection was mutated while being enumerated


  • Subject: Re: Collection was mutated while being enumerated
  • From: Ricky Sharp <email@hidden>
  • Date: Wed, 31 Oct 2007 15:20:06 -0500


On Oct 31, 2007, at 2:51 PM, Sean McBride wrote:

On 10/29/07 2:56 PM, Corbin Dunn said:

Since installing Leopard I'm seeing the following appear appear in
the console: "*** Collection <NSCFDictionary: 0x5e2e540> was mutated
while being enumerated."

I imagine this was something happening in the code before Leopard
but Leopard started logging it. Is there by any chance a breakpoint
I can set to catch where this is occurring? Would be handy.

Several ways; the first way is to link against Leopard. The second way
is to set the user default: NSFastEnumerationShouldThrow=YES.

NSFastEnumerationShouldThrow, eh? 0 hits with Google, 0 hits in Xcode's
doc viewer. :) Are there other new secret debugging aids in 10.5?


I thought the exceptions would come for free (i.e. always be turned on). See the notes in the "Fast Enumeration" section here:

<http://developer.apple.com/leopard/overview/objectivec2.html>

___________________________________________________________
Ricky A. Sharp         mailto:email@hidden
Instant Interactive(tm)   http://www.instantinteractive.com

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  • Follow-Ups:
    • Re: Collection was mutated while being enumerated
      • From: Corbin Dunn <email@hidden>
References: 
 >Collection was mutated while being enumerated (From: Philip Dow <email@hidden>)
 >Re: Collection was mutated while being enumerated (From: Corbin Dunn <email@hidden>)
 >Re: Collection was mutated while being enumerated (From: "Sean McBride" <email@hidden>)

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