On various Linux systems (for example linuxppc64/linuxppc64le but also others) we see errors in jdk11 after
JDK-8224109 added the test java/awt/font/Rotate/RotatedFontTest.java .
See https://hg.openjdk.java.net/jdk-updates/jdk11u/rev/eb8083c6981b
However reverting the change of src/java.desktop/share/native/libfontmanager/freetypeScaler.c that was introduced
by 8224109 together with the test does not make a difference, the error occurs with and without the freetypeScaler.c change .

Example error message (stderr):
java.lang.RuntimeException: images differ, diffCnt=62
at RotatedFontTest.compareImages(RotatedFontTest.java:224)
at RotatedFontTest.test(RotatedFontTest.java:128)
at RotatedFontTest.main(RotatedFontTest.java:115)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:834)