fix #6389

JuliaLang · Apr 4, 2014 · 23e8275 · 23e8275
1 parent e670a17
commit 23e8275
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/toplevel.c b/src/toplevel.c
@@ -582,6 +582,7 @@ void jl_set_datatype_super(jl_datatype_t *tt, jl_value_t *super)
 {
     if (!jl_is_datatype(super) || super == (jl_value_t*)jl_undef_type ||
         !jl_is_abstracttype(super) ||
+        tt->name == ((jl_datatype_t*)super)->name ||
         jl_subtype(super,(jl_value_t*)jl_vararg_type,0) ||
         jl_subtype(super,(jl_value_t*)jl_type_type,0)) {
         jl_errorf("invalid subtyping in definition of %s",tt->name->name->name);