Getting NullPointerException in detekt-formatting MultiLineIfElseRule

[Kshitij09]

Observed Behavior

Getting following crash while running detekt-cli with formatting plugin (version: 1.23.6)

java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getElementType()" because the return value of "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getFirstChildNode()" is null
Running detekt '1.23.6' on Java '17.0.10+1-b1087.17' on OS 'Mac OS X'
If the exception message does not help, please feel free to create an issue on our GitHub page.
	at io.gitlab.arturbosch.detekt.core.AnalyzerKt.throwIllegalStateException(Analyzer.kt:185)
	at io.gitlab.arturbosch.detekt.core.AnalyzerKt.access$throwIllegalStateException(Analyzer.kt:1)
	at io.gitlab.arturbosch.detekt.core.Analyzer$runAsync$tasks$1$2.invoke(Analyzer.kt:93)
	at io.gitlab.arturbosch.detekt.core.Analyzer$runAsync$tasks$1$2.invoke(Analyzer.kt:93)
	at io.gitlab.arturbosch.detekt.core.TaskPoolKt.recover$lambda$1(TaskPool.kt:14)
	at java.base/java.util.concurrent.CompletableFuture.uniExceptionally(CompletableFuture.java:990)
	... 6 more
Caused by: java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getElementType()" because the return value of "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getFirstChildNode()" is null
	at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315)
	at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1770)
	... 3 more
Caused by: java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getElementType()" because the return value of "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getFirstChildNode()" is null
	at com.pinterest.ktlint.ruleset.standard.rules.MultiLineIfElseRule.beforeVisitChildNodes(MultiLineIfElseRule.kt:98)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.beforeVisitChildNodes(FormattingRule.kt:110)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:123)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visitASTNodes(FormattingRule.kt:126)
	at io.gitlab.arturbosch.detekt.formatting.FormattingRule.visit(FormattingRule.kt:56)
	at io.gitlab.arturbosch.detekt.formatting.KtLintMultiRule.visit(KtLintMultiRule.kt:177)
	at io.gitlab.arturbosch.detekt.api.BaseRule.visitFile(BaseRule.kt:46)
	at io.gitlab.arturbosch.detekt.core.Analyzer.analyze$executeRules(Analyzer.kt:131)
	at io.gitlab.arturbosch.detekt.core.Analyzer.analyze(Analyzer.kt:142)
	at io.gitlab.arturbosch.detekt.core.Analyzer.access$analyze(Analyzer.kt:33)
	at io.gitlab.arturbosch.detekt.core.Analyzer$runAsync$tasks$1$1.invoke(Analyzer.kt:90)
	at io.gitlab.arturbosch.detekt.core.Analyzer$runAsync$tasks$1$1.invoke(Analyzer.kt:88)
	at io.gitlab.arturbosch.detekt.core.TaskPoolKt.task$lambda$0(TaskPool.kt:12)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768)
	... 3 more

Steps to Reproduce

I'm not sure how this is valid syntax, but I found following block of code causing this issue, essentially an empty else if () block

if (true)
  println("yes")
else if (
  true
) else if (true) {
    println("yes")
}

Your Environment

• Version of detekt used: 1.23.6
• Operating System and version: Java '17.0.10+1-b1087.17' on OS 'Mac OS X'