I'm not sure if this is the correct place to report a bug. If not, please tell me where to post it.
Version: 2.2.0-rc1-31-gac524db
Compiler: GNU GCC 5.4.0
Compiled on: Jun 24 2018
Qt Version: 5.5.1
Boost Version: 1.58.0
System: Linux Mint 18.3
As the screenshot shows, when drawing a two point line using the polar coordinate something is wrong. I selected the start point of the line in the upper right hand and then entered 2<45. The LibreCAD then drew the line down and to the left and made it much longer that two units.
Selecting the Angle tool and entering the values in the boxes works as expected.