This bug was filed from the crash reporting server and is br-7c4f3b50-4378-4600-b321-c9086fe82097.
Opened powerpoint (.pptx) file directly via Chrome download, this caused a crash.
I then launched Impress, which recovered this document and some other document (Writer). The pptx file could be opened after recovery without crash.
Closing the writer document and impress, then retrying to open via Chrome download page worked without crashing.
Impress Version: 18.104.22.168 (x64)
Build ID: d54a8868f08a7b39642414cf2c8ef2f228f780cf
Based on the crash report this seems to be a duplicate of bug 104034.
*** This bug has been marked as a duplicate of bug 104034 ***