2 files changed, 8 insertions, 0 deletions
diff --git a/java/java-psi-api/src/com/intellij/psi/util/IsConstantExpressionVisitor.java b/java/java-psi-api/src/com/intellij/psi/util/IsConstantExpressionVisitor.java
index bbed9e3d747d..531edd732fae 100644
--- a/java/java-psi-api/src/com/intellij/psi/util/IsConstantExpressionVisitor.java
+++ b/java/java-psi-api/src/com/intellij/psi/util/IsConstantExpressionVisitor.java
@@ -87,6 +87,11 @@ public class IsConstantExpressionVisitor extends JavaElementVisitor {
     for (PsiExpression operand : expression.getOperands()) {
       operand.accept(this);
       if (!myIsConstant) return;
+      final PsiType type = operand.getType();
+      if (type != null && !(type instanceof PsiPrimitiveType) && !type.equalsToText(CommonClassNames.JAVA_LANG_STRING)) {
+        myIsConstant = false;
+        return;
+      }
     }
   }
 
diff --git a/java/java-psi-api/src/com/intellij/psi/util/TypesDistinctProver.java b/java/java-psi-api/src/com/intellij/psi/util/TypesDistinctProver.java
index cbe98a7590ab..5696b8ba0d63 100644
--- a/java/java-psi-api/src/com/intellij/psi/util/TypesDistinctProver.java
+++ b/java/java-psi-api/src/com/intellij/psi/util/TypesDistinctProver.java
@@ -154,6 +154,9 @@ public class TypesDistinctProver {
                                                     PsiType type2,
                                                     PsiClass boundClass1,
                                                     PsiClass boundClass2) {
+    if (boundClass1 == null || boundClass2 == null) {
+      return false;
+    }
     if (boundClass1.isInterface() && boundClass2.isInterface()) return false;
     if (boundClass1.isInterface()) {
       return !(boundClass2.hasModifierProperty(PsiModifier.FINAL) ? InheritanceUtil.isInheritorOrSelf(boundClass2, boundClass1, true) : true);