/home/speed/.atom/packages/arduino-upload/lib/arduino-upload.coffee:290 at processing.app.helpers.FileUtils.listFiles(FileUtils.java:296)
at processing.app.Sketch.listSketchFiles(Sketch.java:108)
at processing.app.Sketch.<init>(Sketch.java:54)
at processing.app.Base.<init>(Base.java:418)
at processing.app.Base.main(Base.java:150)
Error compiling Arduino sketch
java.lang.NullPointerException