diff --git a/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/builder/BasicGroovyBuildTests.java b/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/builder/BasicGroovyBuildTests.java
index ca2d2b9b48..94788b626c 100644
--- a/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/builder/BasicGroovyBuildTests.java
+++ b/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/builder/BasicGroovyBuildTests.java
@@ -2979,10 +2979,37 @@ public void testTraitBasics2() throws Exception {
         expectingCompiledClasses("C", "T", "T$Trait$FieldHelper", "T$Trait$Helper", "T$Trait$StaticFieldHelper");
     }
 
-    @Test // https://github.com/groovy/groovy-eclipse/issues/1267
+    @Test // GROOVY-10249
     public void testTraitBasics3() throws Exception {
         IPath[] paths = createSimpleProject("Project", true);
 
+        //@formatter:off
+        env.addGroovyClass(paths[1], "C",
+            "class C implements T {\n" +
+            "  static main(args) {\n" +
+            "    setP()\n" +
+            "    print p\n" +
+            "    setP(1)\n" +
+            "    print p\n" +
+            "    setP(1,2)\n" +
+            "    print p\n" +
+            "  }\n" +
+            "}\n");
+        env.addGroovyClass(paths[1], "T",
+            "trait T {\n" +
+            "  static Number[] p\n" +
+            "}\n");
+        //@formatter:on
+
+        fullBuild(paths[0]);
+        expectingNoProblems();
+        executeClass(paths[0], "C", "[][1][1, 2]", "");
+    }
+
+    @Test // https://github.com/groovy/groovy-eclipse/issues/1267
+    public void testTraitBasics4() throws Exception {
+        IPath[] paths = createSimpleProject("Project", true);
+
         //@formatter:off
         env.addGroovyClass(paths[1], "p", "C",
             "package p\n" +
diff --git a/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/search/TraitInferencingTests.java b/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/search/TraitInferencingTests.java
index ee59fa59ae..2e0e0c75dd 100644
--- a/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/search/TraitInferencingTests.java
+++ b/base-test/org.eclipse.jdt.groovy.core.tests.builder/src/org/eclipse/jdt/core/groovy/tests/search/TraitInferencingTests.java
@@ -368,6 +368,26 @@ public void testProperty19() {
         assertExprType(source, "setNumber", "java.lang.Void");
     }
 
+    @Test
+    public void testProperty20() {
+        createUnit("T",
+            "trait T {\n" +
+            "  Number[] numbers\n" +
+            "}\n");
+
+        //@formatter:off
+        String source =
+            "class C implements T {\n" +
+            "  void meth() {\n" +
+            "    def arr = numbers\n" +
+            "  }\n" +
+            "}\n";
+        //@formatter:on
+
+        assertDeclType(source, "numbers", "T");
+        assertExprType(source, "numbers", "java.lang.Number[]");
+    }
+
     //
 
     @Test
diff --git a/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/GroovyClassScope.java b/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/GroovyClassScope.java
index 1717a28f53..8725fbfe6b 100644
--- a/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/GroovyClassScope.java
+++ b/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/GroovyClassScope.java
@@ -387,7 +387,8 @@ private Optional<MethodBinding> createSetterMethod(final PropertyNode propertyNo
             TypeBinding[] parameterTypes = {Scope.getBaseType(propertyNode.getType().getName().toCharArray())};
             return asGenerated(new MethodBinding(modifiers, nameChars, TypeBinding.VOID, parameterTypes, Binding.NO_EXCEPTIONS, referenceContext.binding));
         }
-        return asGenerated(new LazilyResolvedMethodBinding(false, propertyNode.getName(), modifiers, nameChars, Binding.NO_EXCEPTIONS, referenceContext.binding));
+        int va = (propertyNode.getType().isArray() ? Flags.AccVarargs : 0); // GROOVY-10249: see AsmClassGenerator#visitConstructorOrMethod
+        return asGenerated(new LazilyResolvedMethodBinding(false, propertyNode.getName(), modifiers | va, nameChars, Binding.NO_EXCEPTIONS, referenceContext.binding));
     }
 
     @Override
diff --git a/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/JDTResolver.java b/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/JDTResolver.java
index 68d5f68745..2830f546b0 100644
--- a/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/JDTResolver.java
+++ b/base/org.eclipse.jdt.groovy.core/src/org/codehaus/jdt/groovy/internal/compiler/ast/JDTResolver.java
@@ -95,6 +95,7 @@ public class JDTResolver extends ResolveVisitor {
         commonTypes.put("java.lang.Short", ClassHelper.Short_TYPE);
         commonTypes.put("java.lang.Void", ClassHelper.void_WRAPPER_TYPE);
 
+        commonTypes.put("java.lang.Number", ClassHelper.Number_TYPE);
         commonTypes.put("java.lang.Object", ClassHelper.OBJECT_TYPE);
         commonTypes.put("java.lang.String", ClassHelper.STRING_TYPE);
 
@@ -269,7 +270,20 @@ public ClassNode resolve(String name) {
             }
         }
 
-        int i = name.indexOf('<');
+        int i = 0;
+        while (name.charAt(i) == '[') {
+            i += 1;
+        }
+        if (i > 0) { // resolve "name" from "[[Lname;" then make dims
+            name = name.substring(i + 1, name.length() - 1);
+            ClassNode type = resolve(name);
+            for (; i > 0; i -= 1) {
+                type = type.makeArray();
+            }
+            return type;
+        }
+
+        i = name.indexOf('<');
         if (i > 0) {
             name = name.substring(0, i);
         }