From 9adc5da8ba51b060862d22333714533352fd6f95 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 22 Oct 2025 19:04:12 +0000
Subject: [PATCH 1/2] Initial plan


From ca017a54a98e10a1348e10fdb05186d08fae118f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 22 Oct 2025 19:25:42 +0000
Subject: [PATCH 2/2] Fix TS2783 false positive for union types in spread
 expressions

Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>
---
 internal/checker/checker.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/checker/checker.go b/internal/checker/checker.go
index da46eb8d95..6932479247 100644
--- a/internal/checker/checker.go
+++ b/internal/checker/checker.go
@@ -12866,7 +12866,7 @@ func (c *Checker) checkObjectLiteral(node *ast.Node, checkMode CheckMode) *Type
 
 func (c *Checker) checkSpreadPropOverrides(t *Type, props ast.SymbolTable, spread *ast.Node) {
 	for _, right := range c.getPropertiesOfType(t) {
-		if right.Flags&ast.SymbolFlagsOptional == 0 {
+		if right.Flags&ast.SymbolFlagsOptional == 0 && right.CheckFlags&ast.CheckFlagsPartial == 0 {
 			if left := props[right.Name]; left != nil {
 				diagnostic := c.error(left.ValueDeclaration, diagnostics.X_0_is_specified_more_than_once_so_this_usage_will_be_overwritten, left.Name)
 				diagnostic.AddRelatedInfo(NewDiagnosticForNode(spread, diagnostics.This_spread_always_overwrites_this_property))