Negative coverage: borrow_check_statement / if / premise borrow_check_block(env, assumptions, state, then_block, places_live_on_exit) => then_state
Premise at line 219. Observed failure causes: failed_judgment.
if| Line | Coverage | Source |
|---|---|---|
| 209 | ✗ | (borrow_check_expr_has_ty( env, assumptions, state, condition, Ty::bool(), Either(then_block, else_block).live_before(env, &state, places_live_on_exit), ) => state) |
| 219 | 1 | (borrow_check_block(env, assumptions, state, then_block, places_live_on_exit) => then_state) |
| 220 | 1 | (borrow_check_block(env, assumptions, state, else_block, places_live_on_exit) => else_state) |
| 223 | N/A | (let state: FlowState = Union((then_state, else_state)).upcast()) |
| ──────── ("if") | ||
| 225 | 14 | (borrow_check_statement(env, assumptions, state, Stmt::If { condition, then_block, else_block }, places_live_on_exit) => (env, state)) |
1 test failed proving this premise:
Source location: tests/borrowck.rs:2671
fn foo() -> u32 {
exists<'r0, 'r1> {
let a: u32 = 22 _ u32;
let p: &'r0 u32 = &'r1 a;
'l: loop {
if true {
a = 23 _ u32;
continue 'l;
} else {
break 'l;
}
}
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 "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 "if"nll.rs:219borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "expr"nll.rs:229borrow_check_expr failednll.rs:340rule "assign"nll.rs:372access_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)
rule "loop"nll.rs:547borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "if"nll.rs:219borrow_check_block failednll.rs:144rule "basic block"nll.rs:159borrow_check_statement failednll.rs:176rule "expr"nll.rs:229borrow_check_expr failednll.rs:340rule "assign"nll.rs:372access_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)