error: environment variable `__HOPEFULLY_NOT_DEFINED__` not defined --> $DIR/extenv-not-defined-default.rs:2:5 | LL | env!("__HOPEFULLY_NOT_DEFINED__"); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error