From bf3ce9d37a2620101b6280124dc7a16de5256a01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Fournier?= <clement.fournier76@gmail.com>
Date: Sat, 11 Nov 2017 12:20:43 +0100
Subject: [PATCH] Allow null value for numeric properties

---
 .../pmd/properties/modules/NumericPropertyModule.java          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pmd-core/src/main/java/net/sourceforge/pmd/properties/modules/NumericPropertyModule.java b/pmd-core/src/main/java/net/sourceforge/pmd/properties/modules/NumericPropertyModule.java
index 36cad41f6d..e728250f48 100644
--- a/pmd-core/src/main/java/net/sourceforge/pmd/properties/modules/NumericPropertyModule.java
+++ b/pmd-core/src/main/java/net/sourceforge/pmd/properties/modules/NumericPropertyModule.java
@@ -39,6 +39,9 @@ public class NumericPropertyModule<T extends Number> {
 
 
     public void checkNumber(T number) {
+        if (number == null) {
+            return; // TODO: remove me when you scrap StatisticalRule (see pull #727)
+        }
         String error = valueErrorFor(number);
         if (error != null) {
             throw new IllegalArgumentException(error);