[FIR] Add empty member scope for type variables

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/ScopeUtils.kt

@@ -64,7 +64,7 @@ fun ConeKotlinType.scope(useSiteSession: FirSession, scopeSession: ScopeSession)
                 FirIntegerLiteralTypeScope(useSiteSession)
             } as FirScope
         }
-        else -> error("Failed type $this")
+        else -> null
     }
 }
 

compiler/fir/resolve/testData/resolve/delegates/extensionGenericGetValue.kt

@@ -0,0 +1,8 @@
+inline fun <L> runLogged(action: () -> L): L {
+    return action()
+}
+
+operator fun <V> V.getValue(receiver: Any?, p: Any): V =
+    runLogged { this }
+
+val testK by runLogged { "K" }

compiler/fir/resolve/testData/resolve/delegates/extensionGenericGetValue.txt

@@ -0,0 +1,17 @@
+FILE: extensionGenericGetValue.kt
+    public final inline fun <L> runLogged(action: R|() -> L|): R|L| {
+        ^runLogged R|<local>/action|.R|FakeOverride<kotlin/Function0.invoke: R|L|>|()
+    }
+    public final operator fun <V> R|V|.getValue(receiver: R|kotlin/Any?|, p: R|kotlin/Any|): R|V| {
+        ^getValue R|/runLogged|<R|V|>(<L> = runLogged@fun <anonymous>(): R|V| <kind=UNKNOWN>  {
+            ^ this@R|/getValue|
+        }
+        )
+    }
+    public final val testK: R|kotlin/String|by R|/runLogged|<R|kotlin/String|>(<L> = runLogged@fun <anonymous>(): R|kotlin/String| <kind=UNKNOWN>  {
+        ^ String(K)
+    }
+    )
+        public get(): R|kotlin/String| {
+            ^ D|/testK|.R|/getValue|<R|kotlin/String|>(Null(null), ::R|/testK|)
+        }

compiler/fir/resolve/testData/resolve/delegates/extensionGetValueWithTypeVariableAsReceiver.kt

@@ -0,0 +1,8 @@
+inline fun <L> runLogged(action: () -> L): L {
+    return action()
+}
+
+operator fun String.getValue(receiver: Any?, p: Any): String =
+    runLogged { this }
+
+val testK by runLogged { "K" }

compiler/fir/resolve/testData/resolve/delegates/extensionGetValueWithTypeVariableAsReceiver.txt

@@ -0,0 +1,17 @@
+FILE: extensionGetValueWithTypeVariableAsReceiver.kt
+    public final inline fun <L> runLogged(action: R|() -> L|): R|L| {
+        ^runLogged R|<local>/action|.R|FakeOverride<kotlin/Function0.invoke: R|L|>|()
+    }
+    public final operator fun R|kotlin/String|.getValue(receiver: R|kotlin/Any?|, p: R|kotlin/Any|): R|kotlin/String| {
+        ^getValue R|/runLogged|<R|kotlin/String|>(<L> = runLogged@fun <anonymous>(): R|kotlin/String| <kind=UNKNOWN>  {
+            ^ this@R|/getValue|
+        }
+        )
+    }
+    public final val testK: R|kotlin/String|by R|/runLogged|<R|kotlin/String|>(<L> = runLogged@fun <anonymous>(): R|kotlin/String| <kind=UNKNOWN>  {
+        ^ String(K)
+    }
+    )
+        public get(): R|kotlin/String| {
+            ^ D|/testK|.R|/getValue|(Null(null), ::R|/testK|)
+        }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsTestGenerated.java

@@ -594,6 +594,16 @@ public class FirDiagnosticsTestGenerated extends AbstractFirDiagnosticsTest {
             runTest("compiler/fir/resolve/testData/resolve/delegates/delegateWithLambda.kt");
         }
 
+        @TestMetadata("extensionGenericGetValue.kt")
+        public void testExtensionGenericGetValue() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/delegates/extensionGenericGetValue.kt");
+        }
+
+        @TestMetadata("extensionGetValueWithTypeVariableAsReceiver.kt")
+        public void testExtensionGetValueWithTypeVariableAsReceiver() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/delegates/extensionGetValueWithTypeVariableAsReceiver.kt");
+        }
+
         @TestMetadata("provideDelegate.kt")
         public void testProvideDelegate() throws Exception {
             runTest("compiler/fir/resolve/testData/resolve/delegates/provideDelegate.kt");

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsWithLightTreeTestGenerated.java

@@ -594,6 +594,16 @@ public class FirDiagnosticsWithLightTreeTestGenerated extends AbstractFirDiagnos
             runTest("compiler/fir/resolve/testData/resolve/delegates/delegateWithLambda.kt");
         }
 
+        @TestMetadata("extensionGenericGetValue.kt")
+        public void testExtensionGenericGetValue() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/delegates/extensionGenericGetValue.kt");
+        }
+
+        @TestMetadata("extensionGetValueWithTypeVariableAsReceiver.kt")
+        public void testExtensionGetValueWithTypeVariableAsReceiver() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/delegates/extensionGetValueWithTypeVariableAsReceiver.kt");
+        }
+
         @TestMetadata("provideDelegate.kt")
         public void testProvideDelegate() throws Exception {
             runTest("compiler/fir/resolve/testData/resolve/delegates/provideDelegate.kt");