--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacMessager.java	Fri Feb 15 05:32:36 2019 -0500
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacMessager.java	Fri Feb 15 12:09:53 2019 +0100
@@ -34,6 +34,7 @@
 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
 import com.sun.tools.javac.tree.JCTree;
 import com.sun.tools.javac.tree.JCTree.*;
+import java.util.Set;
 import javax.lang.model.element.*;
 import javax.tools.JavaFileObject;
 import javax.tools.Diagnostic;
@@ -117,7 +118,7 @@
             switch (kind) {
             case ERROR:
                 errorCount++;
-                log.error(DiagnosticFlag.MULTIPLE, pos, Errors.ProcMessager(msg.toString()));
+                log.error(DiagnosticFlag.API, pos, Errors.ProcMessager(msg.toString()));
                 break;
 
             case WARNING: