diff --git a/com.oracle.truffle.r.ffi.codegen/src/com/oracle/truffle/r/ffi/codegen/FFIUpCallsIndexCodeGen.java b/com.oracle.truffle.r.ffi.codegen/src/com/oracle/truffle/r/ffi/codegen/FFIUpCallsIndexCodeGen.java
index 9f3f8a09acbcb615ba8105ab67a8fda63c666745..6dd2cd8601eb9515440b0161c8e81047a06379d0 100644
--- a/com.oracle.truffle.r.ffi.codegen/src/com/oracle/truffle/r/ffi/codegen/FFIUpCallsIndexCodeGen.java
+++ b/com.oracle.truffle.r.ffi.codegen/src/com/oracle/truffle/r/ffi/codegen/FFIUpCallsIndexCodeGen.java
@@ -22,15 +22,10 @@
  */
 package com.oracle.truffle.r.ffi.codegen;
 
-import java.io.Writer;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.Comparator;
 
-import javax.lang.model.element.ExecutableElement;
-import javax.tools.FileObject;
-import javax.tools.StandardLocation;
-
 import com.oracle.truffle.r.ffi.impl.upcalls.UpCallsRFFI;
 
 /**
diff --git a/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/nodes/AttributesAccessNodes.java b/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/nodes/AttributesAccessNodes.java
index fbe1b12be9818a0a5eedbc6e7d48019ec23afc08..272b93ca537ee356b208279ffb1957407812f559 100644
--- a/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/nodes/AttributesAccessNodes.java
+++ b/com.oracle.truffle.r.ffi.impl/src/com/oracle/truffle/r/ffi/impl/nodes/AttributesAccessNodes.java
@@ -249,7 +249,7 @@ public final class AttributesAccessNodes {
         }
 
         @TruffleBoundary
-        private RPairList getPairList(RLanguage attributes) {
+        private static RPairList getPairList(RLanguage attributes) {
             return attributes.getPairList();
         }
     }
diff --git a/com.oracle.truffle.r.ffi.processor/src/com/oracle/truffle/r/ffi/processor/FFIProcessor.java b/com.oracle.truffle.r.ffi.processor/src/com/oracle/truffle/r/ffi/processor/FFIProcessor.java
index 66c90e6111156e59c95d3b019fd4b10f3f7d722a..1b525d3378ffbce8aae1e59f64483ca509f86a82 100644
--- a/com.oracle.truffle.r.ffi.processor/src/com/oracle/truffle/r/ffi/processor/FFIProcessor.java
+++ b/com.oracle.truffle.r.ffi.processor/src/com/oracle/truffle/r/ffi/processor/FFIProcessor.java
@@ -47,9 +47,7 @@ import javax.lang.model.type.TypeMirror;
 import javax.lang.model.util.Types;
 import javax.tools.Diagnostic;
 import javax.tools.Diagnostic.Kind;
-import javax.tools.FileObject;
 import javax.tools.JavaFileObject;
-import javax.tools.StandardLocation;
 
 public final class FFIProcessor extends AbstractProcessor {
 
diff --git a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/SeqFunctions.java b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/SeqFunctions.java
index ee2e6a97586e167d60f555cd6b4d13fa4c56514b..e5afc0e1e3757a5d375f03d76f7ac1e2bfd173fd 100644
--- a/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/SeqFunctions.java
+++ b/com.oracle.truffle.r.nodes.builtin/src/com/oracle/truffle/r/nodes/builtin/base/SeqFunctions.java
@@ -5,7 +5,7 @@
  *
  * Copyright (c) 1995, 1998  Robert Gentleman and Ross Ihaka
  * Copyright (c) 1998-2015,  The R Core Team
- * Copyright (c) 2013, 2017, Oracle and/or its affiliates
+ * Copyright (c) 2013, 2018, Oracle and/or its affiliates
  *
  * All rights reserved.
  */
diff --git a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPairList.java b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPairList.java
index 13c539fe234edd51218023805bc9442bc77e0346..b729095f5df82ea0face701e2c98ccf540b0eb45 100644
--- a/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPairList.java
+++ b/com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/data/RPairList.java
@@ -38,7 +38,6 @@ import com.oracle.truffle.r.runtime.data.nodes.FastPathVectorAccess.FastPathFrom
 import com.oracle.truffle.r.runtime.data.nodes.SlowPathVectorAccess.SlowPathFromListAccess;
 import com.oracle.truffle.r.runtime.data.nodes.VectorAccess;
 import com.oracle.truffle.r.runtime.gnur.SEXPTYPE;
-import com.oracle.truffle.r.runtime.nodes.RSyntaxNode;
 
 /**
  * Denotes the (rarely seen) {@code pairlist} type in R.
diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/builtins/TestBuiltin_seq_along.java b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/builtins/TestBuiltin_seq_along.java
index 833573507bb54c19a45b9a65878a2ed9785318c4..98b69beaa39845714e5eeae987085cd3b68f8aef 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/builtins/TestBuiltin_seq_along.java
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/builtins/TestBuiltin_seq_along.java
@@ -4,7 +4,7 @@
  * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * Copyright (c) 2012-2014, Purdue University
- * Copyright (c) 2013, 2017, Oracle and/or its affiliates
+ * Copyright (c) 2013, 2018, Oracle and/or its affiliates
  *
  * All rights reserved.
  */