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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 19432] New: - subant -- unhelpful error message
Date Tue, 29 Apr 2003 17:29:25 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=19432

subant -- unhelpful error message

           Summary: subant -- unhelpful error message
           Product: Ant
           Version: 1.6Alpha (nightly)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Core tasks
        AssignedTo: dev@ant.apache.org
        ReportedBy: russel@russel.org.uk


In trying the subant task I made what in hindsight was a very silly error, I
missed out the target= attribute so the target in the build.xml file was:

  <target name="clean">
    <subant antfile="build.xml" inheritall="false" buildpathref="subdirectoryList"/>
  </target>

In the following run the subdirectoryList reference was to a dirset with just
one entry, uk.org.russel.ads, which directory has a build.xml file with a clean
target.  However the error message is:

|> ant clean
Buildfile: build.xml
 
clean:
 
BUILD FAILED
java.lang.NullPointerException
        at org.apache.tools.ant.taskdefs.SubAnt.createAntTask(SubAnt.java:339)
        at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:151)
        at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:127)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:231)
        at org.apache.tools.ant.Task.perform(Task.java:399)
        at org.apache.tools.ant.Target.execute(Target.java:309)
        at org.apache.tools.ant.Target.performTasks(Target.java:336)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1404)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1278)
        at org.apache.tools.ant.Main.runBuild(Main.java:611)
        at org.apache.tools.ant.Main.start(Main.java:198)
        at org.apache.tools.ant.Main.main(Main.java:245)
 
Total time: 4 seconds
java.lang.NullPointerException
        at org.apache.tools.ant.taskdefs.SubAnt.createAntTask(SubAnt.java:339)
        at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:151)
        at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:127)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:231)
        at org.apache.tools.ant.Task.perform(Task.java:399)
        at org.apache.tools.ant.Target.execute(Target.java:309)
        at org.apache.tools.ant.Target.performTasks(Target.java:336)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1404)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1278)
        at org.apache.tools.ant.Main.runBuild(Main.java:611)
        at org.apache.tools.ant.Main.start(Main.java:198)
        at org.apache.tools.ant.Main.main(Main.java:245)
1007 elon.russel.org.uk:~/Books/DJS3e/SourceCode
|>


which isn't the most helpful of error message I have ever come across.  Putting
the target="clean" attribute in the subant task line causes correct behaviour so
there is no fault of functionality.

I should note that this is the 1.6alpha nightly build that I downloaded
2003.04.26.22.58

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