diff -r 6dcbdc9f99fc -r 702043a4cdeb src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Mon Dec 04 10:13:58 2017 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Mon Dec 04 17:54:49 2017 +0000
@@ -53,6 +53,7 @@
 import com.sun.tools.javac.api.MultiTaskListener;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Scope.WriteableScope;
+import com.sun.tools.javac.code.Source.Feature;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.code.Type.ClassType;
 import com.sun.tools.javac.code.Types;
@@ -116,7 +117,6 @@
     private final boolean fatalErrors;
     private final boolean werror;
     private final boolean showResolveErrors;
-    private final boolean allowModules;
 
     private final JavacFiler filer;
     private final JavacMessager messager;
@@ -233,8 +233,6 @@
         initialCompleter = ClassFinder.instance(context).getCompleter();
         chk = Check.instance(context);
         initProcessorLoader();
-
-        allowModules = source.allowModules();
     }
 
     public void setProcessors(Iterable<? extends Processor> processors) {
@@ -770,7 +768,7 @@
 
                 if (psi.processorIterator.hasNext()) {
                     ProcessorState ps = new ProcessorState(psi.processorIterator.next(),
-                                                           log, source, allowModules,
+                                                           log, source, Feature.MODULES.allowedInSource(source),
                                                            JavacProcessingEnvironment.this);
                     psi.procStateList.add(ps);
                     return ps;
@@ -837,7 +835,7 @@
 
         for(TypeElement a  : annotationsPresent) {
             ModuleElement mod = elementUtils.getModuleOf(a);
-            String moduleSpec = allowModules && mod != null ? mod.getQualifiedName() + "/" : "";
+            String moduleSpec = Feature.MODULES.allowedInSource(source) && mod != null ? mod.getQualifiedName() + "/" : "";
             unmatchedAnnotations.put(moduleSpec + a.getQualifiedName().toString(),
                                      a);
         }