FIR IDE: add support of FirStatement in getKtExpressionType

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/components/KtFirExpressionTypeProvider.kt

@@ -7,10 +7,7 @@ package org.jetbrains.kotlin.idea.frontend.api.fir.components
 
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.fir.declarations.FirCallableDeclaration
-import org.jetbrains.kotlin.fir.expressions.FirExpression
-import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
-import org.jetbrains.kotlin.fir.expressions.FirLoop
-import org.jetbrains.kotlin.fir.expressions.argumentMapping
+import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.psi
 import org.jetbrains.kotlin.fir.references.FirErrorNamedReference
 import org.jetbrains.kotlin.fir.references.FirNamedReference
@@ -44,7 +41,7 @@ internal class KtFirExpressionTypeProvider(
         when (val fir = expression.getOrBuildFir(firResolveState)) {
             is FirExpression -> fir.typeRef.coneType.asKtType()
             is FirNamedReference -> fir.getReferencedElementType().asKtType()
-            is FirLoop -> with(analysisSession) { builtinTypes.UNIT }
+            is FirStatement -> with(analysisSession) { builtinTypes.UNIT }
             else -> error("Unexpected ${fir::class}")
         }
     }

idea/idea-frontend-fir/testData/components/expressionType/property.kt

@@ -0,0 +1,7 @@
+val a = 10
+<expr>val x = 1</expr>
+// RESULT
+
+// expression: val x = 1
+// type: kotlin.Unit
+

idea/idea-frontend-fir/tests/org/jetbrains/kotlin/idea/frontend/api/components/HLExpressionTypeTestGenerated.java

@@ -74,6 +74,11 @@ public class HLExpressionTypeTestGenerated extends AbstractHLExpressionTypeTest
         runTest("idea/idea-frontend-fir/testData/components/expressionType/intLiteral.kt");
     }
 
+    @TestMetadata("property.kt")
+    public void testProperty() throws Exception {
+        runTest("idea/idea-frontend-fir/testData/components/expressionType/property.kt");
+    }
+
     @TestMetadata("returnExpression.kt")
     public void testReturnExpression() throws Exception {
         runTest("idea/idea-frontend-fir/testData/components/expressionType/returnExpression.kt");