6954231: SynthTextPaneUI.installUI() doesn't set component to opaque even if prop was not set by client progr
Reviewed-by: alexp
/**
* @test /nodynamiccopyright/
* @bug 6864382
* @summary NullPointerException when compiling a negative java source
* @author mcimadamore
* @compile/fail/ref=T6864382.out -XDrawDiagnostics T6864382.java
*/
class T6864382<T> extends T {}