[NI] Make constraint check for type variables with complex dependency

Additional check for trivial constraints is needed to make lambda
analysis before outer variable fixation to Nothing(?)

^KT-37627 Fixed

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/inference/components/KotlinConstraintSystemCompleter.kt

@@ -214,10 +214,9 @@ class KotlinConstraintSystemCompleter(
         val expectedTypeVariable =
             expectedTypeAtom?.constructor?.takeIf { it in allTypeVariables } ?: variable
 
-        val shouldAnalyzeByEqualityExpectedTypeToVariable =
-            hasProperAtom || !variableForFixation.hasProperConstraint || variableForFixation.hasOnlyTrivialProperConstraint
+        val shouldAnalyze = hasProperAtom || !variableForFixation.hasProperConstraint || variableForFixation.hasOnlyTrivialProperConstraint
 
-        if (!shouldAnalyzeByEqualityExpectedTypeToVariable)
+        if (!shouldAnalyze)
             return false
 
         analyze(preparePostponedAtom(expectedTypeVariable, postponedAtom, variable.builtIns, diagnosticsHolder) ?: return false)

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/inference/components/VariableFixationFinder.kt

@@ -114,6 +114,12 @@ class VariableFixationFinder(
         return when (candidateReadiness) {
             TypeVariableFixationReadiness.FORBIDDEN -> null
             TypeVariableFixationReadiness.WITHOUT_PROPER_ARGUMENT_CONSTRAINT -> VariableForFixation(candidate, false)
+            TypeVariableFixationReadiness.WITH_COMPLEX_DEPENDENCY_UPPER,
+            TypeVariableFixationReadiness.WITH_COMPLEX_DEPENDENCY_LOWER -> VariableForFixation(
+                candidate,
+                hasProperConstraint = variableHasProperArgumentConstraints(candidate),
+                hasOnlyTrivialProperConstraint = variableHasTrivialOrNonProperConstraints(candidate)
+            )
             TypeVariableFixationReadiness.WITH_TRIVIAL_OR_NON_PROPER_CONSTRAINTS ->
                 VariableForFixation(candidate, hasProperConstraint = true, hasOnlyTrivialProperConstraint = true)