Many apologies for not getting to this until now, I thought others had tested this at this point.
I tested this in a fresh Lubuntu 16.04 install. I installed 1.2.1-0ubuntu1 from xenial and I was able to reproduce the crash. But, after updating partitionmanager to 1.2.1-0ubuntu1.1 in xenial-proposed, I was unable to reproduce it, and instead of closing out the window and crashing, it waited for the operation to finish before closing the window.
Many apologies for not getting to this until now, I thought others had tested this at this point.
I tested this in a fresh Lubuntu 16.04 install. I installed 1.2.1-0ubuntu1 from xenial and I was able to reproduce the crash. But, after updating partitionmanager to 1.2.1-0ubuntu1.1 in xenial-proposed, I was unable to reproduce it, and instead of closing out the window and crashing, it waited for the operation to finish before closing the window.
Thanks.