FIR: fix lambda labeling in light tree builder

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/ExpressionsConverter.kt

@@ -128,9 +128,8 @@ class ExpressionsConverter(
             }
         }
 
-        val labelName = lambdaExpression.getLabelName() ?: context.firFunctionCalls.lastOrNull()?.calleeReference?.name?.asString()
-        val target = FirFunctionTarget(labelName = labelName, isLambda = true)
         val expressionSource = lambdaExpression.toFirSourceElement()
+        val target: FirFunctionTarget
         return buildAnonymousFunction {
             source = expressionSource
             session = baseSession
@@ -138,6 +137,10 @@ class ExpressionsConverter(
             receiverTypeRef = implicitType
             symbol = FirAnonymousFunctionSymbol()
             isLambda = true
+            label = context.firLabels.pop() ?: context.firFunctionCalls.lastOrNull()?.calleeReference?.name?.let {
+                buildLabel { name = it.asString() }
+            }
+            target = FirFunctionTarget(labelName = label?.name, isLambda = true)
             context.firFunctionTargets += target
             var destructuringBlock: FirExpression? = null
             for (valueParameter in valueParameterList) {
@@ -165,10 +168,7 @@ class ExpressionsConverter(
                     valueParameter.firValueParameter
                 }
             }
-            label = context.firLabels.pop() ?: context.firFunctionCalls.lastOrNull()?.calleeReference?.name?.let {
-                buildLabel { name = it.asString() }
-            }
-            
+
             body = if (block != null) {
                 declarationsConverter.convertBlockExpressionWithoutBuilding(block!!).apply {
                     if (statements.isEmpty()) {