Merge pull request #40708 from xedin/disable-multi-stmt-inference-inside-result-builder-bodies

[ConstraintSystem] SE-0326: Temporarily prevent multi-statement closure inference in result builder contexts

include/swift/Sema/ConstraintSystem.h

@@ -5292,6 +5292,10 @@ public:
   /// part of the constraint system.
   void forEachExpr(Expr *expr, llvm::function_ref<Expr *(Expr *)> callback);
 
+  /// Determine whether one of the parent closures the given one is nested
+  /// in (if any) has a result builder applied to its body.
+  bool isInResultBuilderContext(ClosureExpr *closure) const;
+
   SWIFT_DEBUG_DUMP;
   SWIFT_DEBUG_DUMPER(dump(Expr *));