copying history stack - segmentation fault
Testing out darktable 3.0.0rc0+112-g44dcf6f35 (master branch). Not sure what caused the crash but I can reproduce by copying the whole history stack from one RAF to another (overwrite), then double-clicking into one of the RAFs.
At this point I have no clue, so please look at the backtrace files and let me know if you want more info or want me to test further. Thanks.