remove finalizer on Close

bindings.go

@@ -227,6 +227,7 @@ func (p *Parser) Debug() {
 func (p *Parser) Close() {
 	if !p.isClosed {
 		C.ts_parser_delete(p.c)
+		runtime.SetFinalizer(p, nil)
 	}
 
 	p.isClosed = true
@@ -309,6 +310,7 @@ func (t *Tree) cachedNode(ptr C.TSNode) *Node {
 func (t *BaseTree) Close() {
 	if !t.isClosed {
 		C.ts_tree_delete(t.c)
+		runtime.SetFinalizer(t, nil)
 	}
 
 	t.isClosed = true
@@ -626,6 +628,7 @@ func NewTreeCursor(n *Node) *TreeCursor {
 func (c *TreeCursor) Close() {
 	if !c.isClosed {
 		C.ts_tree_cursor_delete(c.c)
+		runtime.SetFinalizer(c, nil)
 	}
 
 	c.isClosed = true
@@ -872,6 +875,7 @@ func NewQuery(pattern []byte, lang *Language) (*Query, error) {
 func (q *Query) Close() {
 	if !q.isClosed {
 		C.ts_query_delete(q.c)
+		runtime.SetFinalizer(q, nil)
 	}
 
 	q.isClosed = true
@@ -995,6 +999,7 @@ func (qc *QueryCursor) SetPointRange(startPoint Point, endPoint Point) {
 func (qc *QueryCursor) Close() {
 	if !qc.isClosed {
 		C.ts_query_cursor_delete(qc.c)
+		runtime.SetFinalizer(qc, nil)
 	}
 
 	qc.isClosed = true

bindings_test.go

@@ -679,3 +679,27 @@ func BenchmarkParseInput(b *testing.B) {
 		_, _ = parser.ParseInputCtx(ctx, nil, input)
 	}
 }
+
+func TestManualClose(t *testing.T) {
+	js := "1 + 2"
+
+	parser := NewParser()
+	parser.SetLanguage(getTestGrammar())
+	tree, err := parser.ParseCtx(context.Background(), nil, []byte(js))
+	assert.NoError(t, err)
+	root := tree.RootNode()
+
+	q, err := NewQuery([]byte("(sum) (number)"), getTestGrammar())
+	assert.Nil(t, err)
+
+	qc := NewQueryCursor()
+	qc.Exec(q, root)
+
+	parser.Close()
+	tree.Close()
+	qc.Close()
+	q.Close()
+
+	// run GC to check nothing panics when finalizers (should) have run
+	runtime.GC()
+}