Uninitialized attribute _a1 in base_attr_nullable_int_alt3::Bar::(base_attr_nullable_int_alt3::Foo::run) (alt/base_attr_nullable_int_alt3.nit:58)
,---- Stack trace -- - -  -
| base_attr_nullable_int_alt3::Bar::(base_attr_nullable_int_alt3::Foo::run) (alt/base_attr_nullable_int_alt3.nit:56)
| base_attr_nullable_int_alt3::Bar::init (alt/base_attr_nullable_int_alt3.nit:63)
| base_attr_nullable_int_alt3::Sys::main (alt/base_attr_nullable_int_alt3.nit:75)
`------------------- - -  -