Fix get_all_attributes() for DFS-based diamond-inherited classes

diff --git a/xs-src/Mouse.xs b/xs-src/Mouse.xs
index fd27c5d..3fa716b 100644 (file)
--- a/xs-src/Mouse.xs
+++ b/xs-src/Mouse.xs
@@ -88,7 +88,7 @@ mouse_class_has_custom_buildargs(pTHX_ HV* const stash) {
 static void
 mouse_class_update_xc(pTHX_ SV* const metaclass PERL_UNUSED_DECL, HV* const stash, AV* const xc) {
     AV* const linearized_isa = mro_get_linear_isa(stash);
-    I32 const len            = AvFILLp(linearized_isa);
+    I32 const len            = AvFILLp(linearized_isa) + 1;
     I32 i;
     U32 flags             = 0x00;
     AV* const attrall     = newAV();