I just had a sudden crash while editing some MIDI. I don't know if it is related to plugins but it's was quite unusual.
Code:
Process: REAPER [66386]
Path: /Applications/REAPER64.app/Contents/MacOS/REAPER
Identifier: com.cockos.reaper
Version: 5.62.0 (5.62.0)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: REAPER [66386]
User ID: 501
Date/Time: 2017-11-07 16:49:41.748 -0500
OS Version: Mac OS X 10.12.6 (16G29)
Report Version: 12
Anonymous UUID: 4D8B515F-BC40-34F9-BE00-0447E883E7CA
Sleep/Wake UUID: A6FBAF09-CDC2-4655-A4EF-D10F7A661D02
Time Awake Since Boot: 590000 seconds
Time Since Wake: 4000 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000700f0000e020
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]
Application Specific Information:
objc_msgSend() selector name: isKindOfClass:
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libobjc.A.dylib 0x00007fffdd61a05d objc_msgSend + 29
1 com.cockos.reaper 0x0000000100518faa DestroyWindow(HWND__*) + 106
2 reaper_midi.dylib 0x000000010d53353f MIDIFile_Context::EndTrackSelEdit(bool) + 191
3 reaper_midi.dylib 0x000000010d5328b9 MIDIFile_Context::TrackSelProc(HWND__*, unsigned int, unsigned long, long) + 18729
4 reaper_midi.dylib 0x000000010d52df5f _TrackSelProc(HWND__*, unsigned int, unsigned long, long) + 111
5 com.cockos.reaper 0x00000001004f889c SwellDialogDefaultWindowProc(HWND__*, unsigned int, unsigned long, long) + 364
6 com.cockos.reaper 0x00000001006db8ea CoolSBWndProc(HWND__*, unsigned int, unsigned long, long) + 250
7 com.cockos.reaper 0x00000001004f3b85 -[REAPERSwell_hwnd setFrame:] + 165
8 com.cockos.reaper 0x000000010050edfb SetWindowPos(HWND__*, HWND__*, int, int, int, int, int) + 1403
9 reaper_midi.dylib 0x000000010d4874a7 MIDIFile_Context::editDlgProc(HWND__*, unsigned int, unsigned long, long) + 3063
10 reaper_midi.dylib 0x000000010d486896 _dlgProc(HWND__*, unsigned int, unsigned long, long) + 134
11 com.cockos.reaper 0x00000001004f889c SwellDialogDefaultWindowProc(HWND__*, unsigned int, unsigned long, long) + 364
12 com.cockos.reaper 0x00000001004f55ad -[REAPERSwell_hwnd onSwellMessage:p1:p2:] + 829
13 com.cockos.reaper 0x000000010051571a SendMessage(HWND__*, unsigned int, unsigned long, long) + 90
14 reaper_midi.dylib 0x000000010d4a7b77 MIDIFile_Context::AlignWndControls(HWND__*) + 1639
15 reaper_midi.dylib 0x000000010d4946fb MIDIFile_Context::editDlgProc(HWND__*, unsigned int, unsigned long, long) + 56907
16 reaper_midi.dylib 0x000000010d486896 _dlgProc(HWND__*, unsigned int, unsigned long, long) + 134
17 com.cockos.reaper 0x00000001004f410d -[REAPERSwell_hwnd initChild:Parent:dlgProc:Param:] + 1389
18 com.cockos.reaper 0x00000001004f5a2f -[REAPERSwell_modelesswindow initModeless:Parent:dlgProc:Param:outputHwnd:forceStyles:] + 687
19 com.cockos.reaper 0x00000001004f7e48 SWELL_CreateDialog(SWELL_DialogResourceIndex*, char const*, HWND__*, long (*)(HWND__*, unsigned int, unsigned long, long), long) + 680
20 reaper_midi.dylib 0x000000010d451190 __localizeDialog(void*, char const*, HWND__*, long (*)(HWND__*, unsigned int, unsigned long, long), long, int) + 144
21 reaper_midi.dylib 0x000000010d514d4e displayEditDialog(HWND__*, MIDIFile_Context*) + 270
22 reaper_midi.dylib 0x000000010d46c3c1 PCM_source_midifile::Extended(int, void*, void*, void*) + 18321
23 com.cockos.reaper 0x00000001000b406f OpenMIDIEditor(WDL_PtrList<PCM_source>*) + 255
24 com.cockos.reaper 0x00000001000872ba OpenMIDIEditorEx(WDL_PtrList<PCM_source>*, int, int) + 186
25 com.cockos.reaper 0x00000001000741f2 Main_OnCommandEx2(int, int, ReaProject*) + 35138
26 com.cockos.reaper 0x00000001000cfeaf Main_OnCommandEx(int, int, ReaProject*) + 31
27 com.cockos.reaper 0x0000000100668630 OnOpenReverseItemCommand(ReaProject*, int) + 352
28 com.cockos.reaper 0x0000000100073f75 Main_OnCommandEx2(int, int, ReaProject*) + 34501
29 com.cockos.reaper 0x00000001000cfeaf Main_OnCommandEx(int, int, ReaProject*) + 31
30 com.cockos.reaper 0x00000001001ac0f5 TrackList_OnDoubleClick(int, int) + 4405
31 com.cockos.reaper 0x0000000100536489 TrackListWindowProc(HWND__*, unsigned int, unsigned long, long) + 20969
32 com.cockos.reaper 0x00000001006db8ea CoolSBWndProc(HWND__*, unsigned int, unsigned long, long) + 250
33 reaper_sws_extension.dylib 0x000000011406aa32 ZoomWndProc(HWND__*, unsigned int, unsigned long, long) + 258
34 com.cockos.reaper 0x00000001004f9c08 SWELL_SendMouseMessage(NSView*, int, NSEvent*) + 600
35 com.cockos.reaper 0x00000001004f2c76 -[REAPERSwell_hwnd mouseDown:] + 214
36 com.apple.AppKit 0x00007fffc6b7924f -[NSWindow(NSEventRouting) _handleMouseDownEvent:isDelayedEvent:] + 6341
37 com.apple.AppKit 0x00007fffc6b75a6c -[NSWindow(NSEventRouting) _reallySendEvent:isDelayedEvent:] + 1942
38 com.apple.AppKit 0x00007fffc6b74f0a -[NSWindow(NSEventRouting) sendEvent:] + 541
39 com.apple.AppKit 0x00007fffc69f9681 -[NSApplication(NSEvent) sendEvent:] + 1145
40 com.cockos.reaper 0x0000000100361a15 -[REAPERapp sendEvent:] + 789
41 com.apple.AppKit 0x00007fffc6274427 -[NSApplication run] + 1002
42 com.apple.AppKit 0x00007fffc623ee0e NSApplicationMain + 1237
43 com.cockos.reaper 0x000000010001196c main + 28
44 com.cockos.reaper 0x0000000100011934 start + 52
Thread 1:: com.apple.NSEventThread
0 libsystem_kernel.dylib 0x00007fffde03534a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fffde034797 mach_msg + 55
2 com.apple.CoreFoundation 0x00007fffc8787434 __CFRunLoopServiceMachPort + 212
3 com.apple.CoreFoundation 0x00007fffc87868c1 __CFRunLoopRun + 1361
4 com.apple.CoreFoundation 0x00007fffc8786114 CFRunLoopRunSpecific + 420
5 com.apple.AppKit 0x00007fffc63ccf02 _NSEventThread + 205
6 libsystem_pthread.dylib 0x00007fffde12793b _pthread_body + 180
7 libsystem_pthread.dylib 0x00007fffde127887 _pthread_start + 286
8 libsystem_pthread.dylib 0x00007fffde12708d thread_start + 13