[MacRuby-devel] [MacRuby] #540: segfault with NSURLDownload with GC on

[MacRuby]

#540: segfault with NSURLDownload with GC on
-------------------------------------+--------------------------------------
 Reporter:  mattaimonetti@…          |       Owner:  mattaimonetti@…        
     Type:  defect                   |      Status:  new                    
 Priority:  major                    |   Milestone:  MacRuby 0.5            
Component:  MacRuby                  |    Keywords:                         
-------------------------------------+--------------------------------------
 Script:
 https://gist.github.com/96954a4e59f1293977c0

 Backtrace:
 {{{
 Application Specific Information:
 objc_msgSend() selector name: _downloadActive
 objc[74889]: garbage collection is ON

 Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
 0   libobjc.A.dylib                     0x00007fff8821011c objc_msgSend +
 40
 1   com.apple.Foundation                0x00007fff84db156d
 _NSURLDownloadDidReceiveData + 45
 2   com.apple.CFNetwork                 0x00007fff8143b50f
 URLDownload::sendClientDidReceiveData(long, long, long) + 83
 3   com.apple.CFNetwork                 0x00007fff8143cd9c
 ___asyncWrite_block_invoke_4 + 121
 4   com.apple.CoreFoundation            0x00007fff8060c1b9
 __CFRunLoopDoBlocks + 297
 5   com.apple.CoreFoundation            0x00007fff805cece6 __CFRunLoopRun
 + 3046
 6   com.apple.CoreFoundation            0x00007fff805cdc2f
 CFRunLoopRunSpecific + 575
 7   com.apple.Foundation                0x00007fff84c94a24
 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270
 8   com.apple.Foundation                0x00007fff84ce048a
 -[NSRunLoop(NSRunLoop) runUntilDate:] + 78
 9   ???                                 0x00000001011005fc 0 + 4312794620

 Thread 1:  Dispatch queue: com.apple.libdispatch-manager
 0   libSystem.B.dylib                   0x00007fff8650cbba kevent + 10
 1   libSystem.B.dylib                   0x00007fff8650ea85
 _dispatch_mgr_invoke + 154
 2   libSystem.B.dylib                   0x00007fff8650e75c
 _dispatch_queue_invoke + 185
 3   libSystem.B.dylib                   0x00007fff8650e286
 _dispatch_worker_thread2 + 244
 4   libSystem.B.dylib                   0x00007fff8650dbb8
 _pthread_wqthread + 353
 5   libSystem.B.dylib                   0x00007fff8650da55 start_wqthread
 + 13

 Thread 2:
 0   libSystem.B.dylib                   0x00007fff8650d9da
 __workq_kernreturn + 10
 1   libSystem.B.dylib                   0x00007fff8650ddec
 _pthread_wqthread + 917
 2   libSystem.B.dylib                   0x00007fff8650da55 start_wqthread
 + 13

 Thread 3:
 0   libSystem.B.dylib                   0x00007fff8650d9da
 __workq_kernreturn + 10
 1   libSystem.B.dylib                   0x00007fff8650ddec
 _pthread_wqthread + 917
 2   libSystem.B.dylib                   0x00007fff8650da55 start_wqthread
 + 13

 Thread 4:
 0   libSystem.B.dylib                   0x00007fff864f3e3a mach_msg_trap +
 10
 1   libSystem.B.dylib                   0x00007fff864f44ad mach_msg + 59
 2   com.apple.CoreFoundation            0x00007fff805ce7a2 __CFRunLoopRun
 + 1698
 3   com.apple.CoreFoundation            0x00007fff805cdc2f
 CFRunLoopRunSpecific + 575
 4   com.apple.Foundation                0x00007fff84cd94cf
 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 297
 5   com.apple.Foundation                0x00007fff84c59e99
 __NSThread__main__ + 1429
 6   libSystem.B.dylib                   0x00007fff8652cf8e _pthread_start
 + 331
 7   libSystem.B.dylib                   0x00007fff8652ce41 thread_start +
 13

 Thread 5:
 0   libSystem.B.dylib                   0x00007fff8650d9da
 __workq_kernreturn + 10
 1   libSystem.B.dylib                   0x00007fff8650ddec
 _pthread_wqthread + 917
 2   libSystem.B.dylib                   0x00007fff8650da55 start_wqthread
 + 13

 Thread 6:
 0   libSystem.B.dylib                   0x00007fff865379e2
 select$DARWIN_EXTSN + 10
 1   com.apple.CoreFoundation            0x00007fff805f0242
 __CFSocketManager + 818
 2   libSystem.B.dylib                   0x00007fff8652cf8e _pthread_start
 + 331
 3   libSystem.B.dylib                   0x00007fff8652ce41 thread_start +
 13
 }}}

 works fine with GC_DISABLE=1

 ---

 TODO: Rewrite the script in pure objc, compile with -fobjc-gc and see if
 it's a MacRuby bug or a Cocoa bug.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/540>
MacRuby <http://macruby.org/>