Bad pom in dependent file produces useless error messages at info level
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         Key: MNG-784
         URL: http://jira.codehaus.org/browse/MNG-784
     Project: Maven 2
        Type: Bug
  Components: maven-artifact-ant  
    Versions: 2.0-alpha-3    
 Reporter: Steve Loughran


If a dependent artifact has a bad pom, this is not displayed at info level, 
instead all you get is something like


muse-libraries:
[m2-libraries] Resolving dependencies...

BUILD FAILED - at 25/08/05 14:22
/home/slo/Projects/SmartFrog/Forge/core/components/deployapi/build.xml:102: 
Unable to resolve artifact

you need to run at -v level to extract some meaning

Caused by: 
org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException: Unable 
to read the metadata file
        at 
org.apache.maven.project.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:88)
        at 
org.apache.maven.artifact.resolver.DefaultArtifactCollector.recurse(DefaultArtifactCollector.java:151)
        ... 20 more
Caused by: org.apache.maven.project.ProjectBuildingException: Failed to 
validate POM for 'Artifact [directory-naming:naming-java:pom:0.8]'.

  Reason(s):
  [0]  'modelVersion' is missing.
  [1]  'groupId' is missing.
  [2]  'version' is missing.

        at 
org.apache.maven.project.DefaultMavenProjectBuilder.processProjectLogic(DefaultMavenProjectBuilder.java:439)
        at 
org.apache.maven.project.DefaultMavenProjectBuilder.build(DefaultMavenProjectBuilder.java:317)
        at 
org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:220)
        at 
org.apache.maven.project.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:81)
        ... 21 more

Recommend the underlying cause is retained and displayed

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