com.sun.openpisces.Dasher can cause an ArrayIndexOutOfBoundsException to be thrown at line 159, during a call to System.arraycopy.

               firstSegmentsBuffer =
                        Helpers.widenArray(firstSegmentsBuffer,
                                firstSegidx, type - 2);
                firstSegmentsBuffer[firstSegidx++] = type;
                System.arraycopy(pts, off, firstSegmentsBuffer, firstSegidx, type - 2);

Since firstSegidx is increased by 1 after firstSegmentsBuffer has been widened to make room for (type - 2) more elements, the arraycopy will fail if (firstSegidx + type - 2) is equal to (firstSegmentsBuffer.length).

Changing the last argument in the call to Helpers.widenArray from (type -2) to (type -1) should solve the problem.