true
false
Uninitialized attribute _a2 (alt/base_attr_isset_alt3.nit)
-,---- Stack trace -- - - -
-| check new Foo (alt/base_attr_isset_alt3.nit:0)
-| new Foo base_attr_isset_alt3::Foo::init (alt/base_attr_isset_alt3.nit:53)
-| base_attr_isset_alt3::Sys::main (alt/base_attr_isset_alt3.nit:100)
-`------------------- - - -