@NotNull assertion fix

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/params/GrParameterImpl.java

@@ -257,7 +257,11 @@ public class GrParameterImpl extends GrVariableImpl implements GrParameter {
     GrExpression left = range.getLeftOperand();
     GrExpression right = range.getRightOperand();
     if (right != null) {
-      return TypesUtil.getLeastUpperBound(left.getType(), right.getType(), range.getManager());
+      final PsiType leftType = left.getType();
+      final PsiType rightType = right.getType();
+      if (leftType != null && rightType != null) {
+        return TypesUtil.getLeastUpperBound(leftType, rightType, range.getManager());
+      }
     }
     return null;
   }

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/types/GrClosureSignatureImpl.java

@@ -133,9 +133,13 @@ public class GrClosureSignatureImpl implements GrClosureSignature {
         boolean opt = parameters1[i].isOptional() && parameters2[i].isOptional();
         params[i] = new GrClosureParameterImpl(/*null, */type, opt, null);
       }
-      PsiType returnType = TypesUtil.getLeastUpperBound(signature1.getReturnType(), signature2.getReturnType(), manager);
-      boolean isVarArgs = signature1.isVarargs() && signature2.isVarargs();
-      return new GrClosureSignatureImpl(params, returnType, isVarArgs);
+      final PsiType s1type = signature1.getReturnType();
+      final PsiType s2type = signature2.getReturnType();
+      if (s1type != null && s2type != null) {
+        PsiType returnType = TypesUtil.getLeastUpperBound(s1type, s2type, manager);
+        boolean isVarArgs = signature1.isVarargs() && signature2.isVarargs();
+        return new GrClosureSignatureImpl(params, returnType, isVarArgs);
+      }
     }
     return null; //todo
   }

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/GroovyHighlightingTest.java

@@ -192,6 +192,8 @@ public class GroovyHighlightingTest extends LightCodeInsightFixtureTestCase {
   public void testGstringAssignableToStringInClosureParameter() throws Exception{doTest();}
   public void testEverythingAssignableToString() throws Exception {doTest(new GroovyAssignabilityCheckInspection());}
 
+  public void testEachOverRange() throws Exception {doTest();}
+
   public void testMethodCallWithDefaultParameters() throws Exception {doTest();}
   public void testClosureWithDefaultParameters() throws Exception {doTest();}
   public void testClosureCallMethodWithInapplicableArguments() throws Exception {doTest();}

plugins/groovy/testdata/highlighting/EachOverRange.groovy

@@ -0,0 +1 @@
+(date1..date2).each { it }