}
    }

    // Call the next interceptor in the chain.
    val next = copy(index = index + 1, request = request)
    val interceptor = interceptors[index]

    @Suppress("USELESS_ELVIS")
    val response =
      interceptor.intercept(next) ?: throw NullPointerException(
        "interceptor $interceptor returned null",
      )

    if (exchange != null) {

        require(qualifierIndex != -1) { "Whole type $wholeType should contain $nestedType, but it didn't" }
        return qualifierIndex
    }

    private val syntheticTokenTypes = TokenSet.create(KtTokens.ELVIS, KtTokens.EXCLEXCL)

        val binaryExpression = expression.unwrapQualified<KtBinaryExpression> { binaryExpression, operand ->
            binaryExpression.operationToken == KtTokens.ELVIS && (operand == binaryExpression.left || operand == binaryExpression.right)
        } ?: return null
        if (expression !is KtExpression) return null

            token,
        )
    }
    add(FirErrors.USELESS_ELVIS) { firDiagnostic ->
        UselessElvisImpl(
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.USELESS_ELVIS_RIGHT_IS_NULL) { firDiagnostic ->
        UselessElvisRightIsNullImpl(

- [`KT-55169`](https://youtrack.jetbrains.com/issue/KT-55169) K2: False-negative NO_ELSE_IN_WHEN
- [`KT-55932`](https://youtrack.jetbrains.com/issue/KT-55932) K2. No compiler error when elvis operator returns not matched type
- [`KT-53987`](https://youtrack.jetbrains.com/issue/KT-53987) K2: False negative "TYPE_MISMATCH" with if statement return