Created attachment 200367 [details] forum-mso-de-104903.xlsx Open the attached file, forum-mso-de-104903.xlsx. => Calc hangs. Observed using LO 25.8.0.0.alpha0+ (22ef238e820955f6f8ac84781289b8a1d8e477b9) / Windows. This started with the following commit in 5.0. Looking at the change, it seems like it just triggered a bug elsewhere. https://git.libreoffice.org/core/commit/1b4ae9a937e25c371a6cbfcbeeb9d7c93563acc7 author Mike Kaganski <mikekaganski@hotmail.com> Wed Apr 29 23:43:18 2015 +1000 committer Eike Rathke <erack@redhat.com> Wed Apr 29 16:43:43 2015 +0000 tdf#56036: allow calc compiler treat tabs and newlines as spacers