From 37676a26170be85879273a4c5a019019733ad508 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herv=C3=A9=20Boutemy?= <hboutemy@apache.org>
Date: Fri, 22 Feb 2019 13:33:43 +0100
Subject: [PATCH] [MNG-6599] use version from parent if necessary, like groupId

---
 .../org/apache/maven/model/building/ModelProblemUtils.java    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemUtils.java b/maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemUtils.java
index 1b694c459b..150d60dcf4 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemUtils.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/building/ModelProblemUtils.java
@@ -90,6 +90,10 @@ public class ModelProblemUtils
         String artifactId = model.getArtifactId();
 
         String version = model.getVersion();
+        if ( version == null && model.getParent() != null )
+        {
+            version = model.getParent().getVersion();
+        }
         if ( version == null )
         {
             version = "[unknown-version]";