diff --git a/html/parse.go b/html/parse.go
index 46a89ed..d67705d 100644
--- a/html/parse.go
+++ b/html/parse.go
@@ -840,6 +840,10 @@
 
 	p.parseImpliedToken(StartTagToken, a.Body, a.Body.String())
 	p.framesetOK = true
+	if p.tok.Type == ErrorToken {
+		// Stop parsing.
+		return true
+	}
 	return false
 }
 
diff --git a/html/parse_test.go b/html/parse_test.go
index aa91f4c..24b352e 100644
--- a/html/parse_test.go
+++ b/html/parse_test.go
@@ -468,6 +468,7 @@
 	srcs := []string{
 		"<math><html><template><mn><template></template></template>",
 		"<math><math><head><mi><template>",
+		"<svg><head><title><select><input>",
 	}
 	for _, src := range srcs {
 		// The next line shouldn't infinite-loop.