Switching to seamless mode crashes VB 4.1.12

[B.R.]

I am running VirtualBox 4.1.12 r77245 on Ubuntu 12.04 LTS 64-bit (beta 2 with all the latest updates installed). I am using the standard Unity desktop of Ubuntu.

I've installed a Windows 7 32-bit VM. Now, when switching from normal (windowed) mode to seamless mode, VirtualBox segfaults. With 'dmesg' I find:

VirtualBox[6600]: segfault at 1 ip 00007f85a2dbef91 sp 00007fff2c753ec0 error 4 in VirtualBox.so[7f85a2cd9000+4ff000]

I have checked that this crash is independent of the 3D acceleration and 2D Video acceleration setting and it it independent of whether "absolute pointing device" is checked or not.

[B.R.]

This is to let you know that the bug still occurs (and is 100% reproducable), now running Ubuntu 12.04 LTS 64-bit release version and VirtualBox 4.1.18.

[misha]

Could you create a core dump for the crash, archive it, and upload it to the anonymous FTP server ​ftp://ftp.oracle.com:/appsdev/incoming
Note that this directory is write-only for public users for security reasons.

[B.R.]

Just uploaded the core dump. The file is called Virtualbox_Issue_#10414.zip. It was produced on VirtualBox 4.1.22 and Ubuntu 12.04.1.

Replying to misha:

Could you create a core dump for the crash, archive it, and upload it to the anonymous FTP server ​ftp://ftp.oracle.com:/appsdev/incoming
Note that this directory is write-only for public users for security reasons.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.