GROOVY-10894

Author: eric-milles

base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/basic/TraitsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2009-2022 the original author or authors.
+ * Copyright 2009-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,12 @@
 package org.eclipse.jdt.groovy.core.tests.basic;
 
 import static org.eclipse.jdt.groovy.core.tests.GroovyBundle.isAtLeastGroovy;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import org.codehaus.groovy.ast.AnnotationNode;
 import org.codehaus.groovy.ast.ClassNode;
+import org.codehaus.groovy.ast.FieldNode;
 import org.codehaus.groovy.control.CompilationUnit;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -3045,4 +3048,56 @@ public void testTraits10521() {
 
         runConformTest(sources, "90[x]");
     }
+
+    @Test
+    public void testTraits10894() {
+        //@formatter:off
+        String[] sources = {
+            "Script.groovy",
+            "new C()\n",
+
+            "C.groovy",
+            "class C implements T {\n" +
+            "}\n",
+
+            "T.groovy",
+            "trait T {\n" +
+            "  @Validate String foo\n" +
+            "}\n",
+
+            "Validate.java",
+            "import java.lang.annotation.*;\n" +
+            "@Target(ElementType.TYPE_USE) \n" +
+            "@Retention(RetentionPolicy.RUNTIME)\n" +
+            "public @interface Validate { /**/ }\n" ,
+        };
+        //@formatter:on
+
+        if (isAtLeastGroovy(40)) {
+            runConformTest(sources);
+
+            ClassNode helper = getCUDeclFor("T.groovy").getCompilationUnit().getClassNode("T$Trait$FieldHelper");
+            for (FieldNode field : helper.getFields()) {
+                if (field.getName().endsWith("__foo")) {
+                    java.util.List<AnnotationNode> typeTags =
+                        field.getOriginType().getTypeAnnotations();
+                    assertEquals(1, typeTags.size()); // no duplication
+                }
+            }
+        } else {
+            runNegativeTest(sources,
+                "----------\n" +
+                "1. ERROR in C.groovy (at line 1)\n" +
+                "\tclass C implements T {\n" +
+                "\t^^^^^^^^^^^^^^^^^^^^^\n" +
+                "Groovy:Annotation @Validate is not allowed on element FIELD\n" +
+                "----------\n" +
+                "----------\n" +
+                "1. ERROR in T.groovy (at line 2)\n" +
+                "\t@Validate String foo\n" +
+                "\t^^^^^^^^^\n" +
+                "Groovy:Annotation @Validate is not allowed on element FIELD\n" +
+                "----------\n");
+        }
+    }
 }

base/org.codehaus.groovy25/src/org/codehaus/groovy/transform/trait/TraitASTTransformation.java

@@ -597,7 +597,7 @@ private void processField(final FieldNode field, final MethodNode initializer, f
         dummyField = new FieldNode(
                 dummyFieldName,
                 ACC_STATIC | ACC_PUBLIC | ACC_FINAL | ACC_SYNTHETIC,
-                field.getOriginType(),
+                field.getOriginType().getPlainNodeReference(),
                 fieldHelper,
                 null
         );

base/org.codehaus.groovy30/src/org/codehaus/groovy/transform/trait/TraitASTTransformation.java

@@ -573,7 +573,7 @@ private void processField(final FieldNode field, final MethodNode initializer, f
         dummyField = new FieldNode(
                 dummyFieldName,
                 ACC_PUBLIC | ACC_STATIC | ACC_FINAL | ACC_SYNTHETIC,
-                field.getOriginType(),
+                field.getOriginType().getPlainNodeReference(),
                 fieldHelper,
                 null
         );

base/org.codehaus.groovy40/src/org/codehaus/groovy/transform/trait/TraitASTTransformation.java

@@ -583,7 +583,7 @@ private void processField(final FieldNode field, final MethodNode initializer, f
         dummyField = new FieldNode(
                 dummyFieldName,
                 ACC_PUBLIC | ACC_STATIC | ACC_FINAL | ACC_SYNTHETIC,
-                field.getOriginType(),
+                field.getOriginType().getPlainNodeReference(),
                 fieldHelper,
                 null
         );