System information

• SolveSpace version: 3.0~ab00823a
• Operating system: Ubuntu 20.04.4 LTS 64-bit

Expected behavior

There should be no error solving constraints.

Actual behavior

unsolvable constraints error (distance and angle)

Additional information

Extract attached zip file, open test.slvs, then modify the angle constraint to 60°. Change again the angle to 30°.
test.slvs.zip