The test TestMatrix.java was failing since JDKb18_b26 due to the changes done by https://bugs.openjdk.java.net/browse/JDK-8275063.

The failed test TESTMATRIX.JAVA is calling one more class TESTUPCALL.java, where one new property is being added as part of JDK-8275063 and it is initialised at the headers of the same class, but when we are calling the same class from TestMatrix.java the property is not set and throwing NullPointerException.

After setting the property from TestMatrix.java , the test is passing.