(JDK12b14/Solaris-sparc) SplashScreen::getSplashScreen call fails with ULE: "libsplashscreen.so: ld.so.1: java: fatal: libz.so.1: open failed: No such file or directory"

jdk12b14, Solaris 11

calling SplashScreen.getSplashScreen() leads to

java.lang.UnsatisfiedLinkError: temp/jdk-12/lib/libsplashscreen.so: ld.so.1: java: fatal: libz.so.1: open failed: No such file or directory
java.lang.UnsatisfiedLinkError: temp/jdk-12/lib/libsplashscreen.so: ld.so.1: java: fatal: libz.so.1: open failed: No such file or directory
at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2430)
at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2487)
at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2684)
at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2638)
at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:829)
at java.base/java.lang.System.loadLibrary(System.java:1867)
at java.desktop/java.awt.SplashScreen$1.run(SplashScreen.java:134)
at java.desktop/java.awt.SplashScreen$1.run(SplashScreen.java:132)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/java.awt.SplashScreen.getSplashScreen(SplashScreen.java:131)