モデルをコピーし、その後別オブジェクトにペーストをするとEXC_BAD_ACCESS (SIGSEGV)でクラッシュします。
添付ファイルを付与することができないため、エラーの先頭部分をコピペします：
```
Process: Metasequoia [65171]
Path: /Applications/Metasequoia.app/Contents/MacOS/Metasequoia
Identifier: com.tetraface.Metasequoia
Version: 4.7.6 (34)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Metasequoia [65171]
User ID: 502
Date/Time: 2021-03-25 22:06:03.859 +0900
OS Version: macOS 11.2.1 (20D74)
Report Version: 12
Anonymous UUID: 54C4EA52-536E-29AE-6553-AA8E627D0084
Sleep/Wake UUID: 15FD338E-D5FA-4AD2-9DA3-E01C5F276403
続きを表示...
Time Awake Since Boot: 820000 seconds
Time Since Wake: 9400 seconds
System Integrity Protection: disabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00007f989a6c7a99
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [65171]
VM Regions Near 0x7f989a6c7a99:
MALLOC_MEDIUM (reserved) 7f9861000000-7f9868000000 [112.0M] rw-/rwx SM=NUL reserved VM address space (unallocated)
-->
STACK GUARD 7ffedd4eb000-7ffee0ceb000 [ 56.0M] ---/rwx SM=NUL stack guard for thread 0
Application Specific Information:
Performing @selector(paste:) from sender NSMTMenuItem 0x600006a9b4f0
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 tetraface.BoneDeformer 0x0000000115462c46 BoneDeformerPlugin::OnUseClipboard(MQCDocument*, MQCObject*, MQStationPlugin::CLIPBOARD_METHOD, MQStationPlugin::CLIPBOARD_PARAM&) + 1612
1 tetraface.BoneDeformer 0x0000000115488088 MQOnEvent + 4327
2 com.tetraface.Metasequoia 0x000000010e9e7c86 0x10e715000 + 2960518
3 com.tetraface.Metasequoia 0x000000010e98d049 0x10e715000 + 2588745
4 com.tetraface.Metasequoia 0x000000010e8c884a 0x10e715000 + 1783882
5 com.tetraface.Metasequoia 0x000000010e8f47c8 0x10e715000 + 1963976
6 MTKit.dylib 0x000000010f87f49e MTObject::invokeCallback(MTEventType, MTObject*) + 76
7 MTKit.dylib 0x000000010f89c657 -[NSMTWindow invokeMenuAction:] + 290
8 MTKit.dylib 0x000000010f89c533 -[NSMTWindow paste:] + 17
9 com.apple.AppKit 0x00007fff22e4c7fd -[NSApplication(NSResponder) sendAction:to:from:] + 283
10 com.apple.AppKit 0x00007fff22f4f611 -[NSMenuItem _corePerformAction] + 413
11 com.apple.AppKit 0x00007fff22f4f330 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 95
12 com.apple.AppKit 0x00007fff22f4e395 -[NSMenu performKeyEquivalent:] + 412
13 com.apple.AppKit 0x00007fff233a15a0 routeKeyEquivalent + 521
14 com.apple.AppKit 0x00007fff22db36a7 -[NSApplication(NSEvent) sendEvent:] + 1155
15 MTKit.dylib 0x000000010f8b0086 -[NSMTApplication sendEvent:] + 203
16 com.apple.AppKit 0x00007fff2308bf1e -[NSApplication _handleEvent:] + 65
17 com.apple.AppKit 0x00007fff22c1c6af -[NSApplication run] + 623
18 com.apple.AppKit 0x00007fff22bf096f NSApplicationMain + 816
19 libdyld.dylib 0x00007fff20330621 start + 1
Thread 1:: com.apple.NSEventThread
0 libsystem_kernel.dylib 0x00007fff202e0e7e mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff202e11f0 mach_msg + 60
2 com.apple.CoreFoundation 0x00007fff2040dbf7 __CFRunLoopServiceMachPort + 316
3 com.apple.CoreFoundation 0x00007fff2040c2ca __CFRunLoopRun + 1315
4 com.apple.CoreFoundation 0x00007fff2040b6ce CFRunLoopRunSpecific + 563
5 com.apple.AppKit 0x00007fff22db17c6 _NSEventThread + 124
6 libsystem_pthread.dylib 0x00007fff20315950 _pthread_start + 224
7 libsystem_pthread.dylib 0x00007fff2031147b thread_start + 15
Thread 2:
0 libsystem_pthread.dylib 0x00007fff20311458 start_wqthread + 0
Thread 3:
0 libsystem_pthread.dylib 0x00007fff20311458 start_wqthread + 0
Thread 4:
0 libsystem_pthread.dylib 0x00007fff20311458 start_wqthread + 0
Thread 5:
0 libsystem_pthread.dylib 0x00007fff20311458 start_wqthread + 0
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000010000004 rbx: 0x00007f985b1dda00 rcx: 0x0000000000000000 rdx: 0x0000000000000000
rdi: 0x00007f985a6c7a79 rsi: 0x0000000000000000 rbp: 0x00007ffee14ea0d0 rsp: 0x00007ffee14e9ff0
r8: 0x00000000000003ff r9: 0x00000000000007fb r10: 0x0000000000000a60 r11: 0x0000000000000010
r12: 0x0000000010000008 r13: 0x0000000000000003 r14: 0x0000000010000008 r15: 0x0000000008000000
rip: 0x0000000115462c46 rfl: 0x0000000000010287 cr2: 0x00007f989a6c7a99
Logical CPU: 3
Error Code: 0x00000004 (no mapping for user data read)
Trap Number: 14
Thread 0 instruction stream:
5d 06 00 48 8b 9d 78 ff-ff ff 48 89 df be 04 01 ]..H..x...H.....
00 00 ff 10 89 85 60 ff-ff ff 48 8b 85 68 ff ff ......`...H..h..
ff 48 8b 78 18 48 89 de-e8 d7 bd f7 ff 84 c0 75 .H.x.H.........u
13 48 8b 85 68 ff ff ff-48 8b 78 18 48 89 de e8 .H..h...H.x.H...
28 bc f7 ff 48 8b 7d b0-42 8b 04 a7 89 85 70 ff (...H.}.B.....p.
ff ff 85 c0 0f 8e fa 00-00 00 49 ff c4 45 31 ed ..........I..E1.
[42]8b 34 a7 46 8b 7c a7-04 48 89 df 48 8d 05 57 B.4.F.|..H..H..W <==
5b 06 00 ff 10 89 45 b8-4d 8d 74 24 02 45 85 ff [.....E.M.t$.E..
48 8d 9d 50 ff ff ff 0f-8e a9 00 00 00 44 89 6d H..P.........D.m
a0 45 31 ed c7 45 a8 00-00 00 00 48 8b 7d b0 4c .E1..E.....H.}.L
89 e0 4d 89 f4 48 8b 95-50 ff ff ff 48 85 d2 74 ..M..H..P...H..t
4f 42 8b 0c a7 f3 0f 10-44 87 0c 48 89 d8 31 f6 OB......D..H..1.
Thread 0 last branch register state not available.
```