Created attachment 150779 [details]
Screenshot of Error Message

For the past several weeks LibreOffice will crash when I attempt to create a relationship using the table relationship tool in Base.  I am using LO v. 6.1.52 in Mint 19.1 Cinnamon v. 4.0.10 Linux Kernal 4.15.0-47-generic.  My system in x86 (AMD64).  I was able to recreate the crash after starting in safe mode. I have been unable to tie it to any system or application update.  I was creating a new small HSQLDB database registered in Base.  

Here are the steps to recreate the crash:
1. With the database open, open Tools>Relationships
2. With at least two tables added to the Relationship Editor, choose New Relationship.
3. Using the table drop down field, choose any table.
4. Crash.

I think the following are important to note:
1. This crash occurs when using either an existing database with existing tables or creating a new database and new tables.
2. I was able to recreate the crash in LO safe mode.
3. After uninstalling LO and Installing Apache Open Office, I was able to recreate the crash in AOO.
4. The crash was not reported as a crash in the Mint System Reports.  However, it was cited as a crash in the LibreOffice Recovery dialogue box (see attachment).