System Information
Operating system:
Graphics card:
Blender Version
alpha ... 073fa
Short description of error
add curve - arc .... 75 deg ... modifier screw ... set y axis ... rotate -90 x ... convert to mesh ... go edit mode .... shift alt select bottom hole to fill .... CRASH
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).