10
Uninitialized attribute _a2 (alt/base_attr_nullable_alt4.nit:45)
,---- 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)
| new Bar 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)
`------------------- - -  -