elharo opened a new pull request, #185:
URL: https://github.com/apache/maven-toolchains-plugin/pull/185
Fix potential NullPointerException in `SelectJdkToolchainMojo.getJdkHome()`
by adding null guards for:
- `toolchain.getModel()` returning null
- `model.getConfiguration()` returning null
- `configuration.getChild("jdkHome")` returning null
Uses `instanceof Xpp3Dom` to also prevent ClassCastException if
configuration is not Xpp3Dom.
Includes unit test with `ToolchainPrivate` stubs that prove all three NPE
scenarios against the original code.
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