Accessing to -fx-progress-color initial value creates NPE in CSSParser
Accessing to the initial value creates an NPE.

WARNING: com.sun.javafx.css.parser.CSSParser term Unexpected token '.' at ?[1,087,139]
WARNING: com.sun.javafx.css.parser.CSSParser term Unexpected token '.' at ?[1,087,139]
class com.sun.javafx.scene.control.skin.ProgressIndicatorSkin ERROR WITH -fx-progress-color
Reset exception java.lang.NullPointerException
java.lang.NullPointerException
at com.sun.javafx.css.parser.CSSParser.expr(CSSParser.java:3644)
at com.sun.javafx.css.parser.CSSParser.parseExpr(CSSParser.java:207)
at com.sun.javafx.css.StyleableProperty.parse(StyleableProperty.java:698)
at com.sun.javafx.css.StyleableProperty.getInitialValue(StyleableProperty.java:260)