Negative coverage: borrow_check_expr / binop / premise borrow_check_expr(env, assumptions, state, lhs, rhs.live_before(env, &state, places_live_on_exit)) => (lhs_ty, state)
Premise at line 485. Observed failure causes: failed_judgment.
binop| Line | Coverage | Source |
|---|---|---|
| 485 | 1 | (borrow_check_expr(env, assumptions, state, lhs, rhs.live_before(env, &state, places_live_on_exit)) => (lhs_ty, state)) |
| 486 | ✗ | (prove_ty_is_rigid(env, assumptions, state, &lhs_ty) => (RigidTy {name: RigidName::ScalarId(scalar), parameters: _}, state)) |
| 487 | 1 | (if scalar.is_int()) |
| 488 | 3 | (borrow_check_expr_has_ty(env, assumptions, state, rhs, &lhs_ty, places_live_on_exit) => state) |
| ──────── ("binop") | ||
| 490 | 23 | (borrow_check_expr(env, assumptions, state, Expr::BinOp{lhs, op: _, rhs}, places_live_on_exit) => (lhs_ty, state)) |
1 test failed proving this premise:
Source location: tests/borrowck.rs:5149 (all coverage from this test)
fn foo() -> () {
let x: u32 = 1_u32;
exists<'a> {
let r: &'a mut u32 = &'a mut x;
x = x + *r;
}
}Failed proof tree
check_all_crates failedmod.rs:42args
rule "check all prefixes"mod.rs:54check_crate failedmod.rs:61args
rule "check crate"mod.rs:74check_crate_item failedmod.rs:179rule "free fn"mod.rs:207check_free_fn failedfns.rs:14args
rule "check free fn"fns.rs:24check_fn failedfns.rs:31args
rule "check fn"fns.rs:54check_fn_body failedfns.rs:61args
rule "expr fn body"fns.rs:89borrow_check failednll.rs:124args
rule "borrow_check"nll.rs:135borrow_check_block failednll.rs:142rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "exists"nll.rs:302borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "expr"nll.rs:232borrow_check_expr failednll.rs:371args
rule "assign"nll.rs:397borrow_check_expr failednll.rs:371args
rule "binop"nll.rs:485borrow_check_expr failednll.rs:371args
rule "place"nll.rs:547access_permitted failednll.rs:862args
rule "access_permitted"nll.rs:878access_permitted_by_loans failednll.rs:885rule "access_permitted_by_loans"nll.rs:898access_permitted_by_loan failednll.rs:905args
rule "borrow of disjoint places"nll.rs:920 (failed: if_false)rule "loan is dead"nll.rs:967loan_not_required_by_live_places failednll.rs:1296args
rule "loan_not_required_by_live_places"nll.rs:1321loan_not_required_by_live_place failednll.rs:1328args
rule "loan is not required by type"nll.rs:1348loan_not_required_by_parameter failednll.rs:1396args
rule "alias-ty RFC 1214"nll.rs:1432loan_not_required_by_parameters failednll.rs:1533args
rule "loan_not_required_by_parameters"nll.rs:1554loan_not_required_by_parameter failednll.rs:1396args
rule "rigid-ty"nll.rs:1416loan_not_required_by_parameters failednll.rs:1533args
rule "loan_not_required_by_parameters"nll.rs:1554loan_not_required_by_parameter failednll.rs:1396args
rule "lifetime"nll.rs:1506loan_cannot_outlive failednll.rs:1513args
rule "loan_cannot_outlive"nll.rs:1526 (failed: if_false)
rule "place"nll.rs:547access_permitted failednll.rs:862args
rule "access_permitted"nll.rs:878access_permitted_by_loans failednll.rs:885rule "access_permitted_by_loans"nll.rs:898access_permitted_by_loan failednll.rs:905args
rule "borrow of disjoint places"nll.rs:920 (failed: if_false)rule "loan is dead"nll.rs:967loan_not_required_by_live_places failednll.rs:1296args
rule "loan_not_required_by_live_places"nll.rs:1321loan_not_required_by_live_place failednll.rs:1328args
rule "loan is not required by type"nll.rs:1348loan_not_required_by_parameter failednll.rs:1396args
rule "alias-ty RFC 1214"nll.rs:1432loan_not_required_by_parameters failednll.rs:1533args
rule "loan_not_required_by_parameters"nll.rs:1554loan_not_required_by_parameter failednll.rs:1396args
rule "rigid-ty"nll.rs:1416loan_not_required_by_parameters failednll.rs:1533args
rule "loan_not_required_by_parameters"nll.rs:1554loan_not_required_by_parameter failednll.rs:1396args
rule "lifetime"nll.rs:1506loan_cannot_outlive failednll.rs:1513args
rule "loan_cannot_outlive"nll.rs:1526 (failed: if_false)