Handle profile activation property being null

src/main/java/org/openrewrite/maven/MavenMojoProjectParser.java

@@ -191,7 +191,7 @@ private MavenSettings buildSettings() {
                                 p.getActivation() == null ? null : new ProfileActivation(
                                         p.getActivation().isActiveByDefault(),
                                         p.getActivation().getJdk(),
-                                        new ProfileActivation.Property(
+                                        p.getActivation().getProperty() == null ? null : new ProfileActivation.Property(
                                                 p.getActivation().getProperty().getName(),
                                                 p.getActivation().getProperty().getValue()
                                         )

src/test/java/org/openrewrite/maven/BasicIT.java

@@ -19,6 +19,23 @@ void groupid_artifactid_should_be_ok(MavenExecutionResult result) {
                 .containsOnly("JAR will be empty - no content was marked for inclusion!");
     }
 
+    @MavenTest
+    @MavenOption(value = MavenCLIOptions.SETTINGS, parameter = "settings.xml")
+    @MavenGoal("${project.groupId}:${project.artifactId}:${project.version}:dryRun")
+    void null_check_profile_activation(MavenExecutionResult result) {
+        assertThat(result)
+                .isSuccessful()
+                .out()
+                .info()
+                .anySatisfy(line -> assertThat(line).contains("Applying recipes would make no changes. No patch file generated."));
+
+        assertThat(result)
+                .isSuccessful()
+                .out()
+                .warn()
+                .isEmpty();
+    }
+
     @MavenTest
     @SystemProperty(value = "ossrh_snapshots_url", content = "https://oss.sonatype.org/content/repositories/snapshots")
     @MavenGoal("${project.groupId}:${project.artifactId}:${project.version}:dryRun")

src/test/resources-its/org/openrewrite/maven/BasicIT/null_check_profile_activation/pom.xml

@@ -0,0 +1,32 @@
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.openrewrite.maven</groupId>
+    <artifactId>null_check_profile_activation</artifactId>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+    <name>BasicIT#null_check_profile_activation</name>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>@project.groupId@</groupId>
+                <artifactId>@project.artifactId@</artifactId>
+                <version>@project.version@</version>
+                <configuration>
+                    <activeRecipes>
+                        <recipe>org.openrewrite.java.format.AutoFormat</recipe>
+                    </activeRecipes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/test/resources-its/org/openrewrite/maven/BasicIT/null_check_profile_activation/settings.xml

@@ -0,0 +1,19 @@
+<settings xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                    http://maven.apache.org/xsd/settings-1.0.0.xsd">
+    <profiles>
+        <profile>
+            <id>example_profile_id</id>
+            <activation>
+                <activeByDefault>true</activeByDefault>
+            </activation>
+            <repositories>
+                <repository>
+                    <id>example_repository_id</id>
+                    <url>https://repo.maven.apache.org/maven2/</url>
+                </repository>
+            </repositories>
+        </profile>
+    </profiles>
+
+</settings>