-Uninitialized attribute _a1 in base_attr_nullable_int_alt1::Foo::run (alt/base_attr_nullable_int_alt1.nit:32)
-,---- Stack trace -- - - -
-| base_attr_nullable_int_alt1::Foo::run (alt/base_attr_nullable_int_alt1.nit:30)
-| base_attr_nullable_int_alt1::Foo::init (alt/base_attr_nullable_int_alt1.nit:42)
-| base_attr_nullable_int_alt1::Sys::main (alt/base_attr_nullable_int_alt1.nit:75)
-`------------------- - - -
+Uninitialized attribute _a1 (alt/base_attr_nullable_int_alt1.nit:32)