-// The behavior of AST-borrowck and NLL explcitly differ here due to
-// NLL's increased precision; so we use revisions and do not worry
-// about the --compare-mode=nll on this test.
-
-// revisions: ast nll
-//[ast]compile-flags: -Z borrowck=ast
-//[nll]compile-flags: -Z borrowck=migrate -Z two-phase-borrows
-
-// ignore-compare-mode-nll
-
-#![feature(dropck_eyepatch, rustc_attrs)]
+#![feature(dropck_eyepatch)]
// The point of this test is to illustrate that the `#[may_dangle]`
// attribute specifically allows, in the context of a type
fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); }
}
-fn main() { #![rustc_error] // rust-lang/rust#49855
+
+fn main() {
use std::cell::Cell;
- let c_long;
- let (c, mut dt, mut dr, mut pt, mut pr, st, sr, c_shortest)
- : (Cell<_>, Dt<_>, Dr<_>, Pt<_, _>, Pr<_>, St<_>, Sr<_>, Cell<_>);
- c_long = Cell::new(1);
- c = Cell::new(1);
- c_shortest = Cell::new(1);
-
- // No error: sufficiently long-lived state can be referenced in dtors
- dt = Dt("dt", &c_long);
- dr = Dr("dr", &c_long);
-
- // Error: destructor order imprecisely modelled
- dt = Dt("dt", &c);
- //[ast]~^ ERROR `c` does not live long enough
- dr = Dr("dr", &c);
- //[ast]~^ ERROR `c` does not live long enough
-
- // Error: `c_shortest` dies too soon for the references in dtors to be valid.
- dt = Dt("dt", &c_shortest);
- //[ast]~^ ERROR `c_shortest` does not live long enough
- //[nll]~^^ ERROR `c_shortest` does not live long enough
- dr = Dr("dr", &c_shortest);
- //[ast]~^ ERROR `c_shortest` does not live long enough
-
- // No error: Drop impl asserts .1 (A and &'a _) are not accessed
- pt = Pt("pt", &c_shortest, &c_long);
- pr = Pr("pr", &c_shortest, &c_long);
-
- // Error: Drop impl's assertion does not apply to `B` nor `&'b _`
- pt = Pt("pt", &c_long, &c_shortest);
- //[ast]~^ ERROR `c_shortest` does not live long enough
- pr = Pr("pr", &c_long, &c_shortest);
- //[ast]~^ ERROR `c_shortest` does not live long enough
-
- // No error: St and Sr have no destructor.
- st = St("st", &c_shortest);
- sr = Sr("sr", &c_shortest);
-
- println!("{:?}", (dt.0, dr.0, pt.0, pr.0, st.0, sr.0));
- use_imm(sr.1); use_imm(st.1); use_imm(pr.1); use_imm(pt.1); use_imm(dr.1); use_imm(dt.1);
-}
+ // We use separate blocks with separate variable to prevent the error
+ // messages from being deduplicated.
+
+ {
+ let c_long;
+ let (mut dt, mut dr): (Dt<_>, Dr<_>);
+ c_long = Cell::new(1);
+
+ // No error: sufficiently long-lived state can be referenced in dtors
+ dt = Dt("dt", &c_long);
+ dr = Dr("dr", &c_long);
+ }
+
+ {
+ let (c, mut dt, mut dr): (Cell<_>, Dt<_>, Dr<_>);
+ c = Cell::new(1);
+
+ // No Error: destructor order precisely modelled
+ dt = Dt("dt", &c);
+ dr = Dr("dr", &c);
+ }
+
+ {
+ let (mut dt, mut dr, c_shortest): (Dt<_>, Dr<_>, Cell<_>);
+ c_shortest = Cell::new(1);
+
+ // Error: `c_shortest` dies too soon for the references in dtors to be valid.
+ dt = Dt("dt", &c_shortest);
+ //~^ ERROR `c_shortest` does not live long enough
+ dr = Dr("dr", &c_shortest);
+ }
+
+ {
+ let c_long;
+ let (mut pt, mut pr, c_shortest): (Pt<_, _>, Pr<_>, Cell<_>);
+ c_long = Cell::new(1);
+ c_shortest = Cell::new(1);
+
+ // No error: Drop impl asserts .1 (A and &'a _) are not accessed
+ pt = Pt("pt", &c_shortest, &c_long);
+ pr = Pr("pr", &c_shortest, &c_long);
+ }
+
+ {
+ let c_long;
+ let (mut pt, mut pr, c_shortest): (Pt<_, _>, Pr<_>, Cell<_>);
+ c_long = Cell::new(1);
+ c_shortest = Cell::new(1);
+ // Error: Drop impl's assertion does not apply to `B` nor `&'b _`
+ pt = Pt("pt", &c_long, &c_shortest);
+ //~^ ERROR `c_shortest` does not live long enough
+ pr = Pr("pr", &c_long, &c_shortest);
+ }
+
+ {
+ let (st, sr, c_shortest): (St<_>, Sr<_>, Cell<_>);
+ c_shortest = Cell::new(1);
+ // No error: St and Sr have no destructor.
+ st = St("st", &c_shortest);
+ sr = Sr("sr", &c_shortest);
+ }
+}
fn use_imm<T>(_: &T) { }