10
-Recieved signal 11
-,---- Stack trace -- - - -
-| base_attr_nullable_alt4::Foo::run_other (alt/base_attr_nullable_alt4.nit:42)
-| base_attr_nullable_alt4::Bar::init (alt/base_attr_nullable_alt4.nit:69)
-| base_attr_nullable_alt4::Sys::main (alt/base_attr_nullable_alt4.nit:81)
-`------------------- - - -
+Uninitialized attribute _a2 (alt/base_attr_nullable_alt4.nit:45)