Fix missing parent for Expression in TypeParameterDeclaration (#2017)

ahejlsberg · web-flow · commit 3649a9c3e27e · 2025-11-04T22:06:17.000Z
diff --git a/internal/parser/parser.go b/internal/parser/parser.go
@@ -3119,9 +3119,9 @@ func (p *Parser) parseTypeParameter() *ast.Node {
 	if p.parseOptional(ast.KindEqualsToken) {
 		defaultType = p.parseType()
 	}
-	result := p.finishNode(p.factory.NewTypeParameterDeclaration(modifiers, name, constraint, defaultType), pos)
+	result := p.factory.NewTypeParameterDeclaration(modifiers, name, constraint, defaultType)
 	result.AsTypeParameter().Expression = expression
-	return result
+	return p.finishNode(result, pos)
 }
 
 func (p *Parser) parseParameters(flags ParseFlags) *ast.NodeList {

Original file line number	Diff line number	Diff line change
`@@ -3119,9 +3119,9 @@ func (p Parser) parseTypeParameter() ast.Node {`
`3119`	`3119`	`if p.parseOptional(ast.KindEqualsToken) {`
`3120`	`3120`	`defaultType = p.parseType()`
`3121`	`3121`	`}`
`3122`		`- result := p.finishNode(p.factory.NewTypeParameterDeclaration(modifiers, name, constraint, defaultType), pos)`
	`3122`	`+ result := p.factory.NewTypeParameterDeclaration(modifiers, name, constraint, defaultType)`
`3123`	`3123`	`result.AsTypeParameter().Expression = expression`
`3124`		`- return result`
	`3124`	`+ return p.finishNode(result, pos)`
`3125`	`3125`	`}`
`3126`	`3126`
`3127`	`3127`	`func (p Parser) parseParameters(flags ParseFlags) ast.NodeList {`