Negative coverage: borrow_check_statement / continue / premise drop_places(env, assumptions, state, locals_to_drop, places_live_on_continue) => state
Premise at line 270. Observed failure causes: failed_judgment.
continue| Line | Coverage | Source |
|---|---|---|
| 267 | ✗ | (if state.scope_has_label(label)) |
| 268 | 1 | (if let Some(places_live_on_continue) = state.live_after_continue(label)) |
| 269 | N/A | (let locals_to_drop = state.locals_dropped_to_label(label)) |
| 270 | 1 | (drop_places(env, assumptions, state, locals_to_drop, places_live_on_continue) => state) |
| 271 | N/A | (let state = state.with_continue(label)) |
| 272 | N/A | (let state = state.diverges()) |
| ──────── ("continue") | ||
| 274 | 3 | (borrow_check_statement(env, assumptions, state, Stmt::Continue { label }, places_live_on_exit) => (env, state)) |
1 test failed proving this premise:
Source location: tests/borrowck.rs:2430
fn foo() -> i32 {
exists<'r0, 'r1> {
let r: &'r0 i32;
'a: loop {
let y: i32 = 0 _ i32;
r = &'r1 y;
continue 'a;
}
r; // only an error because of false edges, assumption that all loops terminate
}
}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 "loop"nll.rs:246borrow_check_loop failednll.rs:535rule "fixed-point"nll.rs:555borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "continue"nll.rs:270drop_places failednll.rs:669rule "drop_places"nll.rs:683access_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 "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)
rule "loop"nll.rs:547borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "continue"nll.rs:270drop_places failednll.rs:669rule "drop_places"nll.rs:683access_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 "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)