JBR-2210 IDEA fails to start (JVM crashes) when using the -Dfile.encoding=UTF-8in IDEA's vmoptions file

Added regression test

(cherry picked from commit 4e1f5a43b3)

test/jdk/jb/java/awt/Font/JapaneseLocale/JapaneseLocaleTest.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2000-2020 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import javax.swing.*;
+import java.awt.*;
+
+/**
+ * @test
+ * @summary Regression test for JBR-2210 (JVM crashes on Windows with Japanese locale and UTF-8 enconding)
+ * @run main/othervm -Duser.language=ja -Duser.region=JP -Dfile.encoding=UTF-8 JapaneseLocaleTest
+ */
+
+/*
+ * Description:
+ * Test checks that the JVM does not crash on with Japanese locale and UTF-8 enconding by JFrame creation.
+ */
+
+public class JapaneseLocaleTest {
+    private static JFrame frame;
+    public static void main(String[] args) throws Exception{
+        try {
+            EventQueue.invokeAndWait(JapaneseLocaleTest::initFrame);
+        }
+        finally {
+            EventQueue.invokeAndWait(() ->frame.dispose());
+        }
+    }
+
+    private static void initFrame(){
+        frame = new JFrame();
+        frame.setVisible(true);
+    }
+}