Merge branch 'master' of github.com:apache/commons-lang into 3.9
diff --git a/.travis.yml b/.travis.yml
index 4472d83..8e71802 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,7 +24,6 @@
 
 matrix:
   allow_failures:
-    - jdk: openjdk12
     - jdk: openjdk-ea
 
 script:
diff --git a/pom.xml b/pom.xml
index d44b88d..15dfe15 100644
--- a/pom.xml
+++ b/pom.xml
@@ -606,7 +606,8 @@
     <jmh.version>1.21</jmh.version>
     <uberjar.name>benchmarks</uberjar.name>
 
-    <commons.jacoco.version>0.8.2</commons.jacoco.version>
+    <commons.jacoco.version>0.8.3</commons.jacoco.version>
+    <commons.surefire.version>3.0.0-M3</commons.surefire.version>
 
     <!-- generate report even if there are binary incompatible changes -->
     <commons.japicmp.breakBuildOnBinaryIncompatibleModifications>false</commons.japicmp.breakBuildOnBinaryIncompatibleModifications>
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index dddaaa7..aef34ab 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -46,6 +46,8 @@
   <body>
 
   <release version="3.9" date="2019-04-09" description="New features and bug fixes. Requires Java 8, supports Java 9, 10, 11">
+    <action issue="LANG-1447" type="update" dev="chtompki">FieldUtils.removeFinalModifier(Field, boolean), in java 12
+      throw exception because the final modifier is no longer mutable.</action>
     <action issue="LANG-1446" type="add" dev="chtompki">Switch coverage from cobertura to jacoco.</action>
     <action issue="LANG-1442" type="add" dev="chtompki">Javadoc pointing to Commons RNG.</action>
     <action issue="LANG-1416" type="update" dev="britter">Add more SystemUtils.IS_JAVA_XX variants.</action>
diff --git a/src/main/java/org/apache/commons/lang3/reflect/FieldUtils.java b/src/main/java/org/apache/commons/lang3/reflect/FieldUtils.java
index 68146b1..08fcdc2 100644
--- a/src/main/java/org/apache/commons/lang3/reflect/FieldUtils.java
+++ b/src/main/java/org/apache/commons/lang3/reflect/FieldUtils.java
@@ -17,7 +17,9 @@
 package org.apache.commons.lang3.reflect;
 
 import org.apache.commons.lang3.ClassUtils;
+import org.apache.commons.lang3.JavaVersion;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.SystemUtils;
 import org.apache.commons.lang3.Validate;
 
 import java.lang.annotation.Annotation;
@@ -712,8 +714,12 @@
      *            match {@code public} fields.
      * @throws IllegalArgumentException
      *             if the field is {@code null}
+     * @deprecated As of java 12.0, we can no longer drop the <code>final</code> modifier, thus
+     *             rendering this method obsolete. The JDK discussion about this change can be found
+     *             here: http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-November/056486.html
      * @since 3.3
      */
+    @Deprecated
     public static void removeFinalModifier(final Field field, final boolean forceAccess) {
         Validate.isTrue(field != null, "The field must not be null");
 
@@ -734,7 +740,13 @@
                 }
             }
         } catch (final NoSuchFieldException | IllegalAccessException ignored) {
-            // The field class contains always a modifiers field
+            if (SystemUtils.isJavaVersionAtLeast(JavaVersion.JAVA_12)) {
+              throw new UnsupportedOperationException(
+                  "In java 12+ final cannot be removed.",
+                  ignored
+              );
+            }
+            // else no exception is thrown because we can modify final.
         }
     }
 
diff --git a/src/test/java/org/apache/commons/lang3/reflect/FieldUtilsTest.java b/src/test/java/org/apache/commons/lang3/reflect/FieldUtilsTest.java
index 8217a89..39239ef 100644
--- a/src/test/java/org/apache/commons/lang3/reflect/FieldUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/reflect/FieldUtilsTest.java
@@ -18,6 +18,8 @@
 
 import org.apache.commons.lang3.ArrayUtils;
 
+import org.apache.commons.lang3.JavaVersion;
+import org.apache.commons.lang3.SystemUtils;
 import org.apache.commons.lang3.reflect.testbed.Ambig;
 import org.apache.commons.lang3.reflect.testbed.Annotated;
 import org.apache.commons.lang3.reflect.testbed.Foo;
@@ -43,6 +45,7 @@
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
 import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 /**
@@ -993,10 +996,11 @@
         final Field field = StaticContainer.class.getDeclaredField("IMMUTABLE_PRIVATE_2");
         assertFalse(field.isAccessible());
         assertTrue(Modifier.isFinal(field.getModifiers()));
-        FieldUtils.removeFinalModifier(field);
-        // The field is no longer final
-        assertFalse(Modifier.isFinal(field.getModifiers()));
-        assertFalse(field.isAccessible());
+        callRemoveFinalModifierCheckForException(field, true);
+        if (SystemUtils.isJavaVersionAtMost(JavaVersion.JAVA_11)) {
+            assertFalse(Modifier.isFinal(field.getModifiers()));
+            assertFalse(field.isAccessible());
+        }
     }
 
     @Test
@@ -1004,10 +1008,11 @@
         final Field field = StaticContainer.class.getDeclaredField("IMMUTABLE_PRIVATE_2");
         assertFalse(field.isAccessible());
         assertTrue(Modifier.isFinal(field.getModifiers()));
-        FieldUtils.removeFinalModifier(field, true);
-        // The field is no longer final
-        assertFalse(Modifier.isFinal(field.getModifiers()));
-        assertFalse(field.isAccessible());
+        callRemoveFinalModifierCheckForException(field, true);
+        if (SystemUtils.isJavaVersionAtMost(JavaVersion.JAVA_11)) {
+            assertFalse(Modifier.isFinal(field.getModifiers()));
+            assertFalse(field.isAccessible());
+        }
     }
 
     @Test
@@ -1015,10 +1020,11 @@
         final Field field = StaticContainer.class.getDeclaredField("IMMUTABLE_PRIVATE_2");
         assertFalse(field.isAccessible());
         assertTrue(Modifier.isFinal(field.getModifiers()));
-        FieldUtils.removeFinalModifier(field, false);
-        // The field is STILL final because we did not force access
-        assertTrue(Modifier.isFinal(field.getModifiers()));
-        assertFalse(field.isAccessible());
+        callRemoveFinalModifierCheckForException(field, false);
+        if (SystemUtils.isJavaVersionAtMost(JavaVersion.JAVA_11)) {
+            assertTrue(Modifier.isFinal(field.getModifiers()));
+            assertFalse(field.isAccessible());
+        }
     }
 
     @Test
@@ -1026,10 +1032,32 @@
         final Field field = StaticContainer.class.getDeclaredField("IMMUTABLE_PACKAGE");
         assertFalse(field.isAccessible());
         assertTrue(Modifier.isFinal(field.getModifiers()));
-        FieldUtils.removeFinalModifier(field, false);
-        // The field is no longer final AND we did not need to force access
-        assertTrue(Modifier.isFinal(field.getModifiers()));
-        assertFalse(field.isAccessible());
+        callRemoveFinalModifierCheckForException(field, false);
+        if (SystemUtils.isJavaVersionAtMost(JavaVersion.JAVA_11)) {
+            assertTrue(Modifier.isFinal(field.getModifiers()));
+            assertFalse(field.isAccessible());
+        }
+    }
+
+    /**
+     * Read the <code>@deprecated</code> notice on
+     * {@link FieldUtils#removeFinalModifier(Field, boolean)}.
+     *
+     * @param field {@link Field} to be curried into
+     *              {@link FieldUtils#removeFinalModifier(Field, boolean)}.
+     * @param forceAccess {@link Boolean} to be curried into
+     *              {@link FieldUtils#removeFinalModifier(Field, boolean)}.
+     */
+    private void callRemoveFinalModifierCheckForException(Field field, Boolean forceAccess) {
+        try {
+            FieldUtils.removeFinalModifier(field, forceAccess);
+        } catch (UnsupportedOperationException exception) {
+            if(SystemUtils.isJavaVersionAtLeast(JavaVersion.JAVA_12)) {
+                assertTrue(exception.getCause() instanceof NoSuchFieldException);
+            } else {
+                fail("No exception should be thrown for java prior to 12.0");
+            }
+        }
     }
 
 }