[CSSimplify] Mark all type variables in member type as holes if base is a hole

Even if the member type variable is partially resolved, we still need
to mark inner type variables (if any) as holes because they might not
be connected to anything that could provide contextual type(s).

Resolves: rdar://124549952

Author: xedin

lib/Sema/CSSimplify.cpp

@@ -10739,8 +10739,7 @@ ConstraintSystem::SolutionKind ConstraintSystem::simplifyMemberConstraint(
   // reason to perform a lookup because it wouldn't return any results.
   if (shouldAttemptFixes()) {
     auto markMemberTypeAsPotentialHole = [&](Type memberTy) {
-      if (auto *typeVar = memberTy->getAs<TypeVariableType>())
-        recordPotentialHole(typeVar);
+      recordAnyTypeVarAsPotentialHole(simplifyType(memberTy));
     };
 
     // If this is an unresolved member ref e.g. `.foo` and its contextual base

test/Constraints/members.swift

@@ -816,3 +816,13 @@ func test_mismatch_between_param_and_optional_chain() {
     }
   }
 }
+
+// rdar://124549952 - incorrect "type of expression is ambiguous without a type annotation"
+do {
+  func fn() -> (any BinaryInteger)? {}
+
+  func test() {
+    let _ = fn()?.op().value
+    // expected-error@-1 {{value of type 'any BinaryInteger' has no member 'op'}}
+  }
+}