Some time the guest crash

[bmn]

Host: Windows 7 x64 professional SP1 with all other updates; 32 GB of RAM; processor Intel I7.

Guest: Windows 7 x64 Ultimate SP1.

Some time the guest crash with a messagebox (image attached).

I attach also VBox.log

[bmn]

Error MessageBox image

[bmn]

Translation of Error MessageBox:

The instruction at 0xe1992b39 referenced memory at 0x00000010. The memory could not be read. Click on OK to terminate the program.

[Frank Mehnert]

Please provide a Windows application dump, see here.

[Frank Mehnert]

Could you test the latest 5.1.x Windows test build from here?

[bmn]

Replying to frank:

Could you test the latest 5.1.x Windows test build from here?

When the problem occurs the dump is not created.
I tried it with this test application ​http://www.ntwind.com/software/utilities/badapp.html and the dump is created successfully.
Now I'm testing the version 5.1.x revision 110394 but it has this problem: https://www.virtualbox.org/ticket/15806 already present in v5.1.4

[bmn]

Replying to frank:

Could you test the latest 5.1.x Windows test build from here?

My latest test is Version 5.1.7r110731 that no longer crash. Thanks.