No need to scan base classes

compiler/testData/diagnostics/tests/syntheticExtensions/TypeParameterReceiver.kt

@@ -0,0 +1,16 @@
+// FILE: KotlinFile.kt
+
+fun <T: B> foo(t: T) {
+    t.setSomething(t.getSomething() + 1)
+    t.something++
+}
+
+// FILE: A.java
+public interface A {
+    int getSomething();
+}
+
+// FILE: B.java
+public interface B extends A {
+    void setSomething(int value);
+}

compiler/testData/diagnostics/tests/syntheticExtensions/TypeParameterReceiver.txt

@@ -0,0 +1,19 @@
+package
+
+public /*synthesized*/ fun A(/*0*/ function: () -> kotlin.Int): A
+internal fun </*0*/ T : B> foo(/*0*/ t: T): kotlin.Unit
+
+public interface A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun getSomething(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface B : A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract override /*1*/ /*fake_override*/ fun getSomething(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract fun setSomething(/*0*/ value: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}