diff --git a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/GroovyPropertyTester.java b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/GroovyPropertyTester.java
index dfc8df16c2..37ce6f67d5 100644
--- a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/GroovyPropertyTester.java
+++ b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/GroovyPropertyTester.java
@@ -25,7 +25,6 @@
 import org.codehaus.groovy.ast.Parameter;
 import org.eclipse.core.expressions.PropertyTester;
 import org.eclipse.core.runtime.Adapters;
-import org.eclipse.core.runtime.IAdaptable;
 
 public class GroovyPropertyTester extends PropertyTester {
 
@@ -50,17 +49,15 @@ private static boolean oneStringArray(Parameter[] p) {
 
     @Override
     public boolean test(Object receiver, String property, Object[] arguments, Object expectedValue) {
-        if (receiver instanceof IAdaptable) {
-            ModuleNode node = Adapters.adapt(receiver, ModuleNode.class);
-            if (node != null && !Boolean.TRUE.equals(node.getNodeMetaData("ParseError"))) {
-                switch (property) {
-                case "hasMain":
-                    return node.getClasses().stream().flatMap(cn -> cn.getDeclaredMethods("main").stream()).anyMatch(JAVA_MAIN);
-                case "isScript":
-                    return !node.getStatementBlock().isEmpty() || (!node.getClasses().isEmpty() &&
-                        node.getClasses().get(0).getNameEnd() < 1 /* un-named */ && getGroovyVersion().getMajor() >= 5 &&
-                        node.getClasses().get(0).getDeclaredMethods("main").stream().anyMatch(JEP_445_MAIN.and(JAVA_MAIN.negate())));
-                }
+        ModuleNode node = Adapters.adapt(receiver, ModuleNode.class);
+        if (node != null && !node.encounteredUnrecoverableError()) {
+            switch (property) {
+            case "hasMain":
+                return node.getClasses().stream().flatMap(cn -> cn.getDeclaredMethods("main").stream()).anyMatch(JAVA_MAIN);
+            case "isScript":
+                return !node.getStatementBlock().isEmpty() || (!node.getClasses().isEmpty() &&
+                    node.getClasses().get(0).getNameEnd() < 1 /* un-named */ && getGroovyVersion().getMajor() >= 5 &&
+                    node.getClasses().get(0).getDeclaredMethods("main").stream().anyMatch(JEP_445_MAIN.and(JAVA_MAIN.negate())));
             }
         }
         return false;
diff --git a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/util/GroovyUtils.java b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/util/GroovyUtils.java
index 023ff1665e..267d2d1ce6 100644
--- a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/util/GroovyUtils.java
+++ b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/core/util/GroovyUtils.java
@@ -46,6 +46,7 @@
 import org.codehaus.groovy.ast.Parameter;
 import org.codehaus.groovy.ast.PropertyNode;
 import org.codehaus.groovy.ast.Variable;
+import org.codehaus.groovy.ast.expr.ConstantExpression;
 import org.codehaus.groovy.ast.expr.Expression;
 import org.codehaus.groovy.ast.expr.MethodCallExpression;
 import org.codehaus.groovy.ast.expr.TernaryExpression;
@@ -427,7 +428,7 @@ public static Expression getTraitFieldExpression(MethodCallExpression call) {
         } else if (objType.equals(ClassHelper.CLASS_Type) && asBoolean(objType.getGenericsTypes())) {
             objType = objType.getGenericsTypes()[0].getType(); // look for $static$self.T__name$get()
         }
-        if (Traits.isTrait(objType)) {
+        if (Traits.isTrait(objType) && call.getMethod() instanceof ConstantExpression) {
             Matcher m = Pattern.compile(".+__(\\p{javaJavaIdentifierPart}+)\\$[gs]et").matcher(call.getMethodAsString());
             if (m.matches()) {
                 String fieldName = m.group(1);
diff --git a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/search/TypeInferencingVisitorWithRequestor.java b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/search/TypeInferencingVisitorWithRequestor.java
index 3b91925596..e449e987b8 100644
--- a/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/search/TypeInferencingVisitorWithRequestor.java
+++ b/base/org.eclipse.jdt.groovy.core/src/org/eclipse/jdt/groovy/search/TypeInferencingVisitorWithRequestor.java
@@ -2071,14 +2071,14 @@ private boolean handleSimpleExpression(final Expression node) {
                     primaryType = null; // implicit-this calls are handled like free variables
                     isStatic = scope.isStatic();
                 } else {
-                    isStatic = mce.getObjectExpression() instanceof ClassExpression || primaryType.equals(VariableScope.CLASS_CLASS_NODE);
+                    isStatic = mce.getObjectExpression() instanceof ClassExpression || VariableScope.CLASS_CLASS_NODE.equals(primaryType);
                 }
             } else if (enclosingNode instanceof PropertyExpression) {
                 PropertyExpression pe = (PropertyExpression) enclosingNode;
-                isStatic = pe.getObjectExpression() instanceof ClassExpression || primaryType.equals(VariableScope.CLASS_CLASS_NODE);
+                isStatic = pe.getObjectExpression() instanceof ClassExpression || VariableScope.CLASS_CLASS_NODE.equals(primaryType);
             } else if (enclosingNode instanceof MethodPointerExpression) {
                 MethodPointerExpression mpe = (MethodPointerExpression) enclosingNode;
-                isStatic = mpe.getExpression() instanceof ClassExpression || primaryType.equals(VariableScope.CLASS_CLASS_NODE);
+                isStatic = mpe.getExpression() instanceof ClassExpression || VariableScope.CLASS_CLASS_NODE.equals(primaryType);
             } else /*if (enclosingNode instanceof ImportNode)*/ {
                 isStatic = true;
             }
diff --git a/ide-test/org.codehaus.groovy.eclipse.tests/src/org/codehaus/groovy/eclipse/test/adapters/IsScriptTesterTests.groovy b/ide-test/org.codehaus.groovy.eclipse.tests/src/org/codehaus/groovy/eclipse/test/adapters/IsScriptTesterTests.groovy
index bc462b1bb9..195aba297a 100644
--- a/ide-test/org.codehaus.groovy.eclipse.tests/src/org/codehaus/groovy/eclipse/test/adapters/IsScriptTesterTests.groovy
+++ b/ide-test/org.codehaus.groovy.eclipse.tests/src/org/codehaus/groovy/eclipse/test/adapters/IsScriptTesterTests.groovy
@@ -23,8 +23,8 @@ import org.junit.Test
 
 final class IsScriptTesterTests extends GroovyEclipseTestSuite {
 
-    private void doTest(String name = 'Main', String text, boolean expected) {
-        boolean isScript = new GroovyPropertyTester().test(addGroovySource(text, name), 'isScript', null, null)
+    private void doTest(String text, boolean expected) {
+        boolean isScript = new GroovyPropertyTester().test(addGroovySource(text, nextUnitName()), 'isScript', null, null)
         assert (isScript == expected) : "Should have ${expected ? '' : '*not*'} found a script class in:\n$text"
     }