[CS] Don't bail out of CollectVarRefs early

lib/Sema/CSGen.cpp

@@ -2519,10 +2519,8 @@ namespace {
         std::pair<bool, Expr *> walkToExprPre(Expr *expr) override {
           // If there are any error expressions in this closure
           // it wouldn't be possible to infer its type.
-          if (isa<ErrorExpr>(expr)) {
+          if (isa<ErrorExpr>(expr))
             hasErrorExprs = true;
-            return {false, nullptr};
-          }
 
           // Retrieve type variables from references to var decls.
           if (auto *declRef = dyn_cast<DeclRefExpr>(expr)) {

validation-test/IDE/crashers_2_fixed/sr14709.swift

@@ -0,0 +1,47 @@
+// RUN: %swift-ide-test --code-completion --source-filename %s --code-completion-token=CC
+
+struct Listing {}
+
+protocol View2 {}
+
+extension View2 {
+  @available(macOS 10.15, *)
+  func onTapGesturf(perform action: () -> Void) -> some View2 { fatalError() }
+}
+
+@resultBuilder struct ViewBuilder2 {
+  static func buildBlock() -> Never { fatalError() }
+  static func buildBlock<Content>(_ content: Content) -> Content where Content : View2 { fatalError() }
+}
+
+struct HStack2<Content> : View2 {
+  init(@ViewBuilder2 content: () -> Content) { fatalError() }
+}
+
+struct ItemImage2 : View2 {
+  init(path: String) {}
+}
+
+struct ForEach2<Data, Content>: View2 {
+  init(_ data: [Listing], @ViewBuilder2 content: (Data) -> Content) {}
+}
+
+
+struct TodayNookazonSection {
+
+  let listings: [Listing]
+
+  @available(macOS 10.15, *)
+  @ViewBuilder2 var body: some View2 {
+    ForEach2(listings) { listing in
+      HStack2 {
+        HStack2 {
+          ItemImage2(path#^CC^#: "abc")
+        }
+        .onTapGesturf {
+          listing
+        }
+      }
+    }
+  }
+}