Specifying an unset property in <properties> causes a NullPointerException
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Key: MINVOKER-118
URL: https://jira.codehaus.org/browse/MINVOKER-118
Project: Maven 2.x Invoker Plugin
Issue Type: Bug
Affects Versions: 1.6
Environment: Maven 3.0.2
Reporter: Derek Lewis
Attachments: maven-invoker-plugin-bug.zip
When the invoker plugin is configured with a property as follows:
<properties>
<some.property>${example.property}</some.property>
</properties>
If example.property is not set, the plugin throws a NullPointerException:
Caused by: java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:394)
at java.util.Hashtable.putAll(Hashtable.java:466)
at
org.apache.maven.plugin.invoker.AbstractInvokerMojo.getSystemProperties(AbstractInvokerMojo.java:1413)
at
org.apache.maven.plugin.invoker.AbstractInvokerMojo.runBuild(AbstractInvokerMojo.java:1307)
at
org.apache.maven.plugin.invoker.AbstractInvokerMojo.runBuild(AbstractInvokerMojo.java:1048)
at
org.apache.maven.plugin.invoker.AbstractInvokerMojo.runBuilds(AbstractInvokerMojo.java:974)
at
org.apache.maven.plugin.invoker.AbstractInvokerMojo.execute(AbstractInvokerMojo.java:626)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
I would expect it to either set some.property to "${example.property}" or an
empty string.
The attached testcase has two profiles, profile-with-value and
profile-with-empty-value. With profile-with-value activated, mvn package
passes. With profile-with-empty-value, or no profile activated, mvn package
will fail with the NullPointerException.
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