laeubi opened a new issue, #11552:
URL: https://github.com/apache/maven/issues/11552
### Affected version
4-rc5
### Bug description
I found this during prepare m2e to Maven 4:
```
Contains: Errors running builder 'Maven Project Builder' on project
'resourcefiltering-p005'.
java.lang.NullPointerException: Cannot invoke "Object.toString()" because
"value" is null
at
org.apache.maven.model.ModelBase.lambda$setProperties$5(ModelBase.java:112)
at
org.apache.maven.model.WrapperProperties$OrderedProperties.lambda$forEach$0(WrapperProperties.java:383)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at
org.apache.maven.model.WrapperProperties$OrderedProperties.forEach(WrapperProperties.java:383)
at org.apache.maven.model.ModelBase.setProperties(ModelBase.java:112)
at
org.apache.maven.model.WrapperProperties.writeOperation(WrapperProperties.java:188)
at
org.apache.maven.model.WrapperProperties.writeOperationVoid(WrapperProperties.java:194)
at
org.apache.maven.model.WrapperProperties.clear(WrapperProperties.java:222)
at
org.eclipse.m2e.core.internal.embedder.MavenProjectMutableState.restore(MavenProjectMutableState.java:73)
at
org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:189)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:164)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$1(MavenBuilder.java:109)
at
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:461)
at
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:294)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$0(MavenBuilder.java:100)
at
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:461)
at
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:341)
at
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:280)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:83)
at
org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:192)
at
org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:1109)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:299)
at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:355)
at
org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:449)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
at
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:452)
```
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