Constraint incorporation

In a constraint system a new bound is incorporated:
all new constrains that can be derived from it
(and from existing ones) are added

compiler/testData/diagnostics/tests/resolve/nestedCalls/kt7597.kt

@@ -1,10 +1,8 @@
-// !CHECK_TYPE
-
 interface Inv<I>
 
 fun <S, T: S> Inv<T>.reduce2(): S = null!!
 
 fun test(a: Inv<Int>): Int {
-    val b = 1 <!OVERLOAD_RESOLUTION_AMBIGUITY!>+<!> a.reduce2()
-    return <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>b<!>
+    val b = 1 + a.reduce2()
+    return b
 }

compiler/testData/diagnostics/tests/resolve/nestedCalls/twoTypeParameters.kt

@@ -6,7 +6,12 @@ fun <D, E : D> List<ResolutionTask<D, E>>.bar(t: ResolutionTask<D, E>) = t
 
 public class ResolutionTaskHolder<F, G : F> {
     fun test(candidate: ResolutionCandidate<F>, tasks: MutableList<ResolutionTask<F, G>>) {
-        tasks.bar(ResolutionTask(candidate))
+        tasks.bar(ResolutionTask<F, G>(candidate))
+        tasks.add(ResolutionTask<F, G>(candidate))
+
+        //todo the problem is the type of ResolutionTask is inferred as ResolutionTask<F, F> too early
+        tasks.<!TYPE_INFERENCE_CONFLICTING_SUBSTITUTIONS!>bar<!>(ResolutionTask(candidate))
+        tasks.<!NONE_APPLICABLE!>add<!>(ResolutionTask(candidate))
     }
 }