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GNUMail crashes

From: Riccardo Mottola
Subject: GNUMail crashes
Date: Fri, 12 Sep 2014 17:13:35 +0200
User-agent: GNUMail (Version 1.2.1)


when a timeout happens on GNUMail and IMAP, I get a crash:

#0  0xb720d2f3 in objc_msg_lookup ()
   from /usr/lib/gcc/i686-pc-linux-gnu/4.8.3/
#1  0xb72a370d in -[GSMutableArray addObject:] (self=0x82bedf8,
    _cmd=0xb76400a8 <_OBJC_SELECTOR_TABLE+40>, anObject=0x84efe80)
    at GSArray.m:472
#2  0xb73318cc in NSAllMapTableKeys (table=0x8208cc8)
    at NSConcreteMapTable.m:180
#3  0xb7ed1d92 in number_of_unread_messages ()
    at ApplicationIconController.m:176
#4  0xb7ed220b in -[ApplicationIconView drawRect:] (self=0x825ba60,
    _cmd=0xb7b0aa80 <_OBJC_SELECTOR_TABLE+2112>, theRect=...)
    at ApplicationIconController.m:289

IN this local code, I added two checks:

  cache = [[MailboxManagerController singleInstance] cache];
  if (cache == nil)
      NSLog(@"number_of_unread_messages(): nil cache");
      return 0;

  if (_cache == nil)
NSLog(@"number_of_unread_messages(): nil _cache. Possibly connection closed.");
      return 0;
  allKeys = NSAllMapTableKeys(_cache);
  result = 0;

Besides the initial confusion between _cache and cache, we know that _cache is not nil, het NSAllMapTableKeys is nil. Why?

when the connection terminates, It gets treated this way:
- (void) connectionTerminated: (NSNotification *) theNotification
  NSMapRemove(_cache, [theNotification object]);
  [self update];

why should I get a crash later?


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