diff options
Diffstat (limited to 'tests/ui/uninhabited/privately-uninhabited-mir-call.rs')
-rw-r--r-- | tests/ui/uninhabited/privately-uninhabited-mir-call.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/ui/uninhabited/privately-uninhabited-mir-call.rs b/tests/ui/uninhabited/privately-uninhabited-mir-call.rs new file mode 100644 index 000000000..2764bb563 --- /dev/null +++ b/tests/ui/uninhabited/privately-uninhabited-mir-call.rs @@ -0,0 +1,29 @@ +// Verifies that MIR building for a call expression respects +// privacy when checking if a call return type is uninhabited. + +pub mod widget { + enum Unimplemented {} + pub struct Widget(Unimplemented); + + impl Widget { + pub fn new() -> Widget { + todo!(); + } + } + + pub fn f() { + let x: &mut u32; + Widget::new(); + // Ok. Widget type returned from new is known to be uninhabited + // and the following code is considered unreachable. + *x = 1; + } +} + +fn main() { + let y: &mut u32; + widget::Widget::new(); + // Error. Widget type is not known to be uninhabited here, + // so the following code is considered reachable. + *y = 2; //~ ERROR E0381 +} |