fix crash on invalid _type_error call

itchyny · Aug 9, 2020 · ea6aea5 · ea6aea5
1 parent 0272f67
commit ea6aea5
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/func.go b/func.go
@@ -1644,7 +1644,10 @@ func funcBuiltins(interface{}) interface{} {
 }
 
 func internalfuncTypeError(v, x interface{}) interface{} {
-	return &funcTypeError{x.(string), v}
+	if x, ok := x.(string); ok {
+		return &funcTypeError{x, v}
+	}
+	return &funcTypeError{"_type_error", v}
 }
 
 func toInt(x interface{}) (int, bool) {