src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -1756,11 +1756,11 @@
             }
             module = allowModules ? ".*/" : "";
             pkg = s;
         } else {
             String moduleName = s.substring(0, slash);
-            if (!SourceVersion.isIdentifier(moduleName)) {
+            if (!SourceVersion.isName(moduleName)) {
                 return warnAndNoMatches(s, p, log, lint);
             }
             module = Pattern.quote(moduleName + "/");
             // And warn if module is specified if modules aren't supported, conditional on -Xlint:proc?
             pkg = s.substring(slash + 1);