NullPointerException when using 0.9.12 and later to run tests with native image compilation

[mpeddada1]

Describe the bug
Running a simple test with native-maven-plugin 0.9.12 and later is resulting a NullPointerException at build time.

To Reproduce
Reproduce: https://github.com/mpeddada1/junit-testrule

Expected behavior
The tests run successfully with the versions in question.

Logs
Following the steps in the README of the reproducer is resulting in this stacktrace:

[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.example.MySampleTest
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.028 s - in com.example.MySampleTest
[INFO] 
[INFO] Results:
[INFO] 
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] 
[INFO] 
[INFO] --- native-maven-plugin:0.9.13:test (test-native) @ child-project ---
[INFO] ====================
[INFO] Initializing project: child-project
[INFO] ====================
[INFO] Found GraalVM installation from JAVA_HOME variable.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.770 s
[INFO] Finished at: 2022-07-20T17:43:43-04:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.graalvm.buildtools:native-maven-plugin:0.9.13:test (test-native) on project child-project: Execution test-native of goal org.graalvm.buildtools:native-maven-plugin:0.9.13:test failed.: NullPointerException -> [Help 1]

Snippet of stacktrace with -X flag

However, note that this test runs successfully with 0.9.11

System Info (please complete the following information):

• OS: Linux
• GraalVM Version: 22.1.0 CE
• Java Version: 11
• Plugin version: native-maven-plugin 0.9.12 and 0.9.13

I'm wondering if anyone has run into this problem? Thank you!

cc @suztomo @meltsufin

[suztomo]

Can you run the Maven command with "-X" (debug) and copy-paste it in https://gist.github.com ?

[mpeddada1]

Yes, I've edited the issue description above to include a snippet of the stacktrace determine from -X.

[suztomo]

Nice. It shows the exact line number that hit NullPointerException. Let's wait for the maintainers.

Caused by: java.lang.NullPointerException
    at org.graalvm.buildtools.maven.AbstractNativeMojo.processArtifact (AbstractNativeMojo.java:285)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.getMainBuildPath (AbstractNativeMojo.java:351)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.populateApplicationClasspath (AbstractNativeMojo.java:361)
    at org.graalvm.buildtools.maven.NativeTestMojo.populateApplicationClasspath (NativeTestMojo.java:88)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.populateClasspath (AbstractNativeMojo.java:372)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.getClasspath (AbstractNativeMojo.java:378)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.getBuildArgs (AbstractNativeMojo.java:211)
    at org.graalvm.buildtools.maven.AbstractNativeMojo.buildImage (AbstractNativeMojo.java:393)
    at org.graalvm.buildtools.maven.NativeTestMojo.execute (NativeTestMojo.java:149)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)

[zliu9125]

Also come across this case. And I found that when adding <packaging>pom</packaging> and other necessary spring-native plugins to the pom of pure springboot project generated at https://start.spring.io/ and then run mvn -Pnative -DskipTests clean package may reproduce this issue.