Don't allocate empty slice for named members (#1312)

jakebailey · web-flow · commit b7f1b499b41f · 2025-07-07T21:20:35.000Z
diff --git a/internal/checker/checker.go b/internal/checker/checker.go
@@ -21133,6 +21133,9 @@ func (c *Checker) getDefaultOrUnknownFromTypeParameter(t *Type) *Type {
 }
 
 func (c *Checker) getNamedMembers(members ast.SymbolTable) []*ast.Symbol {
+	if len(members) == 0 {
+		return nil
+	}
 	result := make([]*ast.Symbol, 0, len(members))
 	for id, symbol := range members {
 		if c.isNamedMember(symbol, id) {

Original file line number	Diff line number	Diff line change
`@@ -21133,6 +21133,9 @@ func (c Checker) getDefaultOrUnknownFromTypeParameter(t Type) *Type {`
`21133`	`21133`	`}`
`21134`	`21134`
`21135`	`21135`	`func (c Checker) getNamedMembers(members ast.SymbolTable) []ast.Symbol {`
	`21136`	`+ if len(members) == 0 {`
	`21137`	`+ return nil`
	`21138`	`+ }`
`21136`	`21139`	`result := make([]*ast.Symbol, 0, len(members))`
`21137`	`21140`	`for id, symbol := range members {`
`21138`	`21141`	`if c.isNamedMember(symbol, id) {`