rust/src/test/compile-fail/bang-tailexpr.rs

// error-pattern: some control paths may return
fn f() -> ! { 3 }
fn main(){}
Handle bang functions correctly in typestate The logic for how the "returns" constraint was handled was always dodgy, for reasons explained in the comments I added to auxiliary::fn_info in this commit. Fixed it by adding distinct "returns" and "diverges" constraints for each function, which are both handled positively (that is: for a ! function, the "diverges" constraint must be true on every exit path; for any other function, the "returns" constraint must be true on every exit path). Closes #779 2011-08-01 22:55:04 -05:00			`// error-pattern: some control paths may return`
			`fn f() -> ! { 3 }`
			`fn main(){}`