Negative coverage: borrow_check_expr / ref / premise access_permitted( env, assumptions, state, Access::new(access_kind, place), places_live_on_exit, ) => state
Premise at line 446. Observed failure causes: failed_judgment.
ref| Line | Coverage | Source |
|---|---|---|
| 434 | ✗ | (borrow_check_place_expr( env, assumptions, state, place, ) => (place, state)) |
| 442 | N/A | (let access_kind = match kind { RefKind::Shared => AccessKind::Read, RefKind::Mut => AccessKind::Write, }) |
| 446 | 1 | (access_permitted( env, assumptions, state, Access::new(access_kind, place), places_live_on_exit, ) => state) |
| 455 | N/A | (let state = state.with_loan(Loan::new(lt, place, kind))) |
| 456 | N/A | (let ty = place.ty.ref_ty_of_kind(kind, lt)) |
| ──────── ("ref") | ||
| 458 | 17 | (borrow_check_expr(env, assumptions, state, Expr::Ref { kind, lt, place }, places_live_on_exit) => (ty, state)) |
1 test failed proving this premise:
Source location: tests/borrowck.rs:2944
fn bar() -> u32 {
exists<'r0, 'r1, 'r2> {
let v: u32 = 0 _ u32;
let p: &'r0 u32 = &'r1 v;
let _: u32 = foo::<'r2>(&mut 'r2 v);
return *p;
}
}Failed proof tree
check_all_crates failedmod.rs:41rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60rule "check crate"mod.rs:73check_crate_item failedmod.rs:163rule "free fn"mod.rs:191check_free_fn failedfns.rs:14rule "check free fn"fns.rs:24check_fn failedfns.rs:31rule "check fn"fns.rs:55check_fn_body failedfns.rs:62rule "expr fn body"fns.rs:90borrow_check failednll.rs:126rule "borrow_check"nll.rs:137borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "exists"nll.rs:298borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "let"nll.rs:193borrow_check_expr_has_ty failednll.rs:319rule "block"nll.rs:332borrow_check_expr failednll.rs:340rule "call"nll.rs:411borrow_check_expr_has_ty failednll.rs:319rule "block"nll.rs:332borrow_check_expr failednll.rs:340rule "ref"nll.rs:446access_permitted failednll.rs:690rule "access_permitted"nll.rs:706access_permitted_by_loans failednll.rs:713rule "access_permitted_by_loans"nll.rs:726access_permitted_by_loan failednll.rs:733rule "borrow of disjoint places"nll.rs:748 (failed: if_false)rule "loan is dead"nll.rs:794loan_not_required_by_live_places failednll.rs:1096rule "loan_not_required_by_live_places"nll.rs:1121loan_not_required_by_live_place failednll.rs:1128rule "loan is not required by type"nll.rs:1148loan_not_required_by_parameter failednll.rs:1196rule "alias-ty RFC 1214"nll.rs:1232loan_not_required_by_parameters failednll.rs:1333rule "loan_not_required_by_parameters"nll.rs:1354loan_not_required_by_parameter failednll.rs:1196rule "rigid-ty"nll.rs:1216loan_not_required_by_parameters failednll.rs:1333rule "loan_not_required_by_parameters"nll.rs:1354loan_not_required_by_parameter failednll.rs:1196rule "lifetime"nll.rs:1306loan_cannot_outlive failednll.rs:1313rule "loan_cannot_outlive"nll.rs:1326 (failed: if_false)
rule "write-indirect"nll.rs:775 (failed: if_let)