[NI] Filter out type variable from its dependencies

Don't take into account complex variable dependency on itself when determining fixation status.
^KT-37621 Fixed

compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.fir.kt

@@ -0,0 +1,35 @@
+// Issue: KT-37621
+// !LANGUAGE: +NewInference
+
+class Inv<T>
+class In<in I>
+class Out<out O>
+
+inline fun <reified TB : Inv<TB>> invBound(): TB = TODO()
+inline fun <reified IB : In<IB>> inBound(): IB = TODO()
+inline fun <reified OB : Out<OB>> outBound(): OB = TODO()
+
+inline fun <reified T : Inv<T>> testInv(): T {
+    return try {
+        invBound()
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}
+
+inline fun <reified T : In<T>> testIn(): T {
+    return try {
+        inBound()
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}
+
+// Unexpected behaviour
+inline fun <reified T : Out<T>> testOut(): T {
+    return try {
+        outBound()
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}

compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.kt

@@ -0,0 +1,35 @@
+// Issue: KT-37621
+// !LANGUAGE: +NewInference
+
+class Inv<T>
+class In<in I>
+class Out<out O>
+
+inline fun <reified TB : Inv<TB>> invBound(): TB = TODO()
+inline fun <reified IB : In<IB>> inBound(): IB = TODO()
+inline fun <reified OB : Out<OB>> outBound(): OB = TODO()
+
+inline fun <reified T : Inv<T>> testInv(): T {
+    return try {
+        <!DEBUG_INFO_EXPRESSION_TYPE("T")!>invBound()<!>
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}
+
+inline fun <reified T : In<T>> testIn(): T {
+    return try {
+        <!DEBUG_INFO_EXPRESSION_TYPE("T")!>inBound()<!>
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}
+
+// Unexpected behaviour
+inline fun <reified T : Out<T>> testOut(): T {
+    <!UNREACHABLE_CODE!>return<!> try {
+        <!IMPLICIT_NOTHING_TYPE_ARGUMENT_IN_RETURN_POSITION, REIFIED_TYPE_FORBIDDEN_SUBSTITUTION, REIFIED_TYPE_FORBIDDEN_SUBSTITUTION!>outBound<!>()
+    } catch (ex: Exception) {
+        throw Exception()
+    }
+}

compiler/testData/diagnostics/tests/inference/nothingType/reifiedParameterWithRecursiveBound.txt

@@ -0,0 +1,29 @@
+package
+
+public inline fun </*0*/ reified IB : In<IB>> inBound(): IB
+public inline fun </*0*/ reified TB : Inv<TB>> invBound(): TB
+public inline fun </*0*/ reified OB : Out<OB>> outBound(): OB
+public inline fun </*0*/ reified T : In<T>> testIn(): T
+public inline fun </*0*/ reified T : Inv<T>> testInv(): T
+public inline fun </*0*/ reified T : Out<T>> testOut(): T
+
+public final class In</*0*/ in I> {
+    public constructor In</*0*/ in I>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Inv</*0*/ T> {
+    public constructor Inv</*0*/ T>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Out</*0*/ out O> {
+    public constructor Out</*0*/ out O>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}