I'm having an issue where Max crashes when I try to host various VST plugins inside of Max for Live. They work fine hosted in a normal Max patch. This happens on Ableton 10.1 and 11 on a 2019 Macbook Pro w Catalina, and on Ableton 10.1 on a 2013 Macbook Pro running Mojave. I'm using Max 8.1, and it happens with several different VST plugins from different developers.

To reproduce, I start a new Ableton session, add a new Max Audio effect, open it in the Max editor, add a vst~ object which points to some plugin, and Max dies shortly after. The exception seems to be either a EXC_BAD_ACCESS (SIGSEGV) or EXC_CRASH (SIGABRT). I've pasted an example stack trace below.

For other reasons, I also reformatted my computer, installed Ableton 10.1 and the problem is still there.

Does anyone have any idea what might be causing this? I can't host these plugins directly in Ableton as I'm working in the Ambisonic domain (16 ch).

Max(16035,0x1183afdc0) malloc: Incorrect checksum for freed object 0x7f9be8f0b5c0: probably modified after being freed.

Thread 0 Crashed:: CrBrowserMain Dispatch queue: 

0 libsystem_kernel.dylib     0x00007fff6a97c33a __pthread_kill + 10

1 libsystem_pthread.dylib     0x00007fff6aa38e60 pthread_kill + 430

2 libsystem_c.dylib     0x00007fff6a903808 abort + 120

3 libsystem_malloc.dylib     0x00007fff6a9f950b malloc_vreport + 548

4 libsystem_malloc.dylib     0x00007fff6aa0ad27 malloc_zone_error + 183

5 libsystem_malloc.dylib     0x00007fff6a9f1081 tiny_free_list_remove_ptr + 690

6 libsystem_malloc.dylib     0x00007fff6a9f0279 tiny_free_no_lock + 1018

7 libsystem_malloc.dylib     0x00007fff6a9efd8b free_tiny + 459

     0x00007fff306cad06 -[__NSArrayM dealloc] + 309

     0x00007fff307cd1a5 __CFBasicHashRemoveValue + 141

     0x00007fff306f03f9 CFBasicHashRemoveValue + 2989

     0x00007fff30708405 CFDictionaryRemoveValue + 179

     0x00007fff2d992ddc -[NSMenuKEUniquer removeItem:] + 72

     0x00007fff2d9a89ad -[NSMenu removeItemAtIndex:] + 322

14 com.cycling74.Max     0x000000011035a420 juce::JuceMainMenuHandler::menuBarItemsChanged(juce::MenuBarModel*) + 1216

15 com.cycling74.Max     0x00000001103634bb juce::MenuBarModel::handleAsyncUpdate() + 59

16 com.cycling74.Max     0x000000010fdc8c32 MaxMenuModel::handleAsyncUpdate() + 36

17 com.cycling74.Max     0x000000011024c5bb

I'm having an issue where Max crashes when I try to host various VST plugins inside of Max for Live. They work fine hosted in a normal Max patch. This happens on Ableton 10.1 and 11 on a 2019 Macbook Pro w Catalina, and on Ableton 10.1 on a 2013 Macbook Pro running Mojave. I'm using Max 8.1, and it happens with several different VST plugins from different developers.

To reproduce, I start a new Ableton session, add a new Max Audio effect, open it in the Max editor, add a vst~ object which points to some plugin, and Max dies shortly after. The exception seems to be either a EXC_BAD_ACCESS (SIGSEGV) or EXC_CRASH (SIGABRT). I've pasted an example stack trace below.

For other reasons, I also reformatted my computer, installed Ableton 10.1 and the problem is still there.

Does anyone have any idea what might be causing this? I can't host these plugins directly in Ableton as I'm working in the Ambisonic domain (16 ch).

Application Specific Information:
abort() called
Max(16035,0x1183afdc0) malloc: Incorrect checksum for freed object 0x7f9be8f0b5c0: probably modified after being freed.
Corrupt value: 0xffc00000ffc00000

Thread 0 Crashed:: CrBrowserMain  Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff6a97c33a __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff6aa38e60 pthread_kill + 430
2   libsystem_c.dylib             	0x00007fff6a903808 abort + 120
3   libsystem_malloc.dylib        	0x00007fff6a9f950b malloc_vreport + 548
4   libsystem_malloc.dylib        	0x00007fff6aa0ad27 malloc_zone_error + 183
5   libsystem_malloc.dylib        	0x00007fff6a9f1081 tiny_free_list_remove_ptr + 690
6   libsystem_malloc.dylib        	0x00007fff6a9f0279 tiny_free_no_lock + 1018
7   libsystem_malloc.dylib        	0x00007fff6a9efd8b free_tiny + 459
8   com.apple.CoreFoundation      	0x00007fff306cad06 -[__NSArrayM dealloc] + 309
9   com.apple.CoreFoundation      	0x00007fff307cd1a5 __CFBasicHashRemoveValue + 141
10  com.apple.CoreFoundation      	0x00007fff306f03f9 CFBasicHashRemoveValue + 2989
11  com.apple.CoreFoundation      	0x00007fff30708405 CFDictionaryRemoveValue + 179
12  com.apple.AppKit              	0x00007fff2d992ddc -[NSMenuKEUniquer removeItem:] + 72
13  com.apple.AppKit              	0x00007fff2d9a89ad -[NSMenu removeItemAtIndex:] + 322
14  com.cycling74.Max             	0x000000011035a420 juce::JuceMainMenuHandler::menuBarItemsChanged(juce::MenuBarModel*) + 1216
15  com.cycling74.Max             	0x00000001103634bb juce::MenuBarModel::handleAsyncUpdate() + 59
16  com.cycling74.Max             	0x000000010fdc8c32 MaxMenuModel::handleAsyncUpdate() + 36
17  com.cycling74.Max             	0x000000011024c5bb
and so on...

Hello.
I'm having an issue where Max crashes when I try to host various VST plugins inside of Max for Live. They work fine hosted in a norma

hosting-vst-plugins-inside-m4l-causes-crash

Upon further investigation, it seems this crash is related to the version of Max. I was using 8.1.11 (latest at the time of writing) but found an older version (8.1.5) which does not seem to crash.

Thanks for the report. This will be fixed in the next Max 8.2 beta!

hosting VST plugins inside M4L causes crash