source/structopt/attributes.d(37,20): Error: scope variable `names` assigned to `this` with longer lifetime
source/app.d(6,12):        called from here: `Option(null).this(["threads", "t"][])`
source/app.d(10,12): Error: CTFE failed because of previous errors in `this`
/opt/dmd-safe/dmd/dmd-safe failed with exit code 1.