sonar扫描kotlin 代码报错 Cannot analyse 'XXXXServiceImpl.kt' with 'KtChecksVisitor': n

• 问题现象：

// sonar 扫描控制台报错，有可能会导致代码覆盖率等指标不准确
16:56:47.623 ERROR: Cannot analyse 'XXXXServiceImpl.kt' with 'KtChecksVisitor': null
java.lang.NullPointerException: null
        at org.sonarsource.kotlin.checks.ConditionalStructure.<init>(AbstractBranchDuplication.kt:62)
        at org.sonarsource.kotlin.checks.AbstractBranchDuplication.visitIfExpression(AbstractBranchDuplication.kt:40)
        at org.sonarsource.kotlin.checks.AbstractBranchDuplication.visitIfExpression(AbstractBranchDuplication.kt:29)
        at org.jetbrains.kotlin.psi.KtIfExpression.accept(KtIfExpression.java:33)
        at org.sonarsource.kotlin.visiting.KtChecksVisitor$visit$1$1$1.invoke(KtChecksVisitor.kt:39)
        at org.sonarsource.kotlin.visiting.KtChecksVisitor$visit$1$1$1.invoke(KtChecksVisitor.kt:34)
        at org.sonarsource.kotlin.plugin.MetricsUtilsKt.measureDuration(MetricsUtils.kt:26)
        at org.sonarsource.kotlin.visiting.KtChecksVisitor.visit(KtChecksVisitor.kt:34)
        at org.sonarsource.kotlin.visiting.KotlinFileVisitor.scan(KotlinFileVisitor.kt:28)
        at org.sonarsource.kotlin.plugin.KotlinSensor$visitFile$1.invoke(KotlinSensor.kt:230)
        at org.sonarsource.kotlin.plugin.KotlinSensor$visitFile$1.invoke(KotlinSensor.kt:229)
        at org.sonarsource.kotlin.plugin.MetricsUtilsKt.measureDuration(MetricsUtils.kt:26)
        at org.sonarsource.kotlin.plugin.KotlinSensor.visitFile(KotlinSensor.kt:229)
        at org.sonarsource.kotlin.plugin.KotlinSensor.analyseFile(KotlinSensor.kt:217)
        at org.sonarsource.kotlin.plugin.KotlinSensor.access$analyseFile(KotlinSensor.kt:64)
        at org.sonarsource.kotlin.plugin.KotlinSensor$analyseFiles$1.invoke(KotlinSensor.kt:192)
        at org.sonarsource.kotlin.plugin.KotlinSensor$analyseFiles$1.invoke(KotlinSensor.kt:191)
        at org.sonarsource.kotlin.plugin.MetricsUtilsKt.measureDuration(MetricsUtils.kt:26)
        at org.sonarsource.kotlin.plugin.KotlinSensor.analyseFiles(KotlinSensor.kt:191)
        at org.sonarsource.kotlin.plugin.KotlinSensor.execute(KotlinSensor.kt:119)
        at org.sonar.scanner.sensor.AbstractSensorWrapper.analyse(AbstractSensorWrapper.java:64)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:88)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.lambda$execute$1(ModuleSensorsExecutor.java:61)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.withModuleStrategy(ModuleSensorsExecutor.java:79)
        at org.sonar.scanner.sensor.ModuleSensorsExecutor.execute(ModuleSensorsExecutor.java:61)
        at org.sonar.scanner.scan.SpringModuleScanContainer.doAfterStart(SpringModuleScanContainer.java:82)
        at org.sonar.core.platform.SpringComponentContainer.startComponents(SpringComponentContainer.java:188)
        at org.sonar.core.platform.SpringComponentContainer.execute(SpringComponentContainer.java:167)
        at org.sonar.scanner.scan.SpringProjectScanContainer.scan(SpringProjectScanContainer.java:403)
        at org.sonar.scanner.scan.SpringProjectScanContainer.scanRecursively(SpringProjectScanContainer.java:399)
        at org.sonar.scanner.scan.SpringProjectScanContainer.doAfterStart(SpringProjectScanContainer.java:368)
        at org.sonar.core.platform.SpringComponentContainer.startComponents(SpringComponentContainer.java:188)
        at org.sonar.core.platform.SpringComponentContainer.execute(SpringComponentContainer.java:167)
        at org.sonar.scanner.bootstrap.SpringGlobalContainer.doAfterStart(SpringGlobalContainer.java:137)
        at org.sonar.core.platform.SpringComponentContainer.startComponents(SpringComponentContainer.java:188)
        at org.sonar.core.platform.SpringComponentContainer.execute(SpringComponentContainer.java:167)
        at org.sonar.batch.bootstrapper.Batch.doExecute(Batch.java:72)
        at org.sonar.batch.bootstrapper.Batch.execute(Batch.java:66)
        at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:46)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60)
        at com.sun.proxy.$Proxy0.execute(Unknown Source)
        at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:189)
        at org.sonarsource.scanner.api.EmbeddedScanner.execute(EmbeddedScanner.java:138)
        at org.sonarsource.scanner.cli.Main.execute(Main.java:112)
        at org.sonarsource.scanner.cli.Main.execute(Main.java:75)
        at org.sonarsource.scanner.cli.Main.main(Main.java:61)

• 问题原因分析：

 // 问题代码片段
  override fun xxxxTravel(xxx: XXXDTO) {
        if (xxx.type == "1" ||
            xxx.type == "2" ||
            xxx.type == "3" ||
            xxx.type == "4"
        ) else {
            return
        }
    }
// sonar扫描 识别不了 if(xx)else{} 语法
// sonar kotlin源码
// 解析条件分支，ifTree，这个ifTree是null

• 问题修复

override fun xxxxTravel(xxx: XXXDTO) {
        val types = listOf("1", "2", "3", "4")
        if (!types.contains(xxx.type)) {
            return
        }
    }