I’ve been seeing a fair number of crashes in Studio One and Reaper, in different places, but often in code where we are simply drawing some lines or rectangles or text. Below is a portion of a crash log showing one such crash I have seen. I understand the note that an “object was probably modified after being freed”, but trying to see what object it is is difficult, since it happens so randomly. I just don’t get why drawing a line would cause this kind of crash. Any ideas where I can look? Could it be something in VSTGUI itself?
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Application Specific Information:
abort() called
*** error for object 0x7faf125bcc00: incorrect checksum for freed object - object was probably modified after being freed.
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fffe414dd42 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fffe423b5bf pthread_kill + 90
2 libsystem_c.dylib 0x00007fffe40b3420 abort + 129
3 libsystem_malloc.dylib 0x00007fffe41adf5d szone_error + 626
4 libsystem_malloc.dylib 0x00007fffe41af925 small_free_list_remove_ptr_no_clear + 766
5 libsystem_malloc.dylib 0x00007fffe41a390e small_malloc_from_free_list + 394
6 libsystem_malloc.dylib 0x00007fffe41a1953 szone_malloc_should_clear + 1649
7 libsystem_malloc.dylib 0x00007fffe41a1282 malloc_zone_malloc + 107
8 libsystem_malloc.dylib 0x00007fffe41a0200 malloc + 24
9 com.apple.CoreGraphics 0x00007fffcec176b0 aal_create + 164
10 com.apple.CoreGraphics 0x00007fffceba33cf ripr_Acquire + 124
11 com.apple.CoreGraphics 0x00007fffceba3250 RIPRenderPath + 73
12 com.apple.CoreGraphics 0x00007fffce90d6fa ripc_DrawPath + 346
13 com.apple.AppKit 0x00007fffcc40c364 __backing_store_DrawPath_block_invoke + 35
14 com.apple.AppKit 0x00007fffcc11e15b backing_store_delegate + 984
15 com.apple.AppKit 0x00007fffcc40b937 backing_store_DrawPath + 475
16 com.apple.CoreGraphics 0x00007fffceb458ea CGContextDrawPath + 182
17 com.Antares.AutoTune.vst3 0x000000012ca52087 VSTGUI::CGDrawContext::drawLine(std::__1::pair<VSTGUI::CPoint, VSTGUI::CPoint> const&) + 423 (cgdrawcontext.cpp:395)
18 com.Antares.AutoTune.vst3 0x000000012ca1c654 VSTGUI::CDrawContext::drawLine(VSTGUI::CPoint const&, VSTGUI::CPoint const&) + 180 (cdrawcontext.h:90)