Negative coverage: borrow_check_expr / assign / premise borrow_check_place_expr( env, assumptions, state, place, ) => (place, state)
Premise at line 406. Observed failure causes: failed_judgment.
assign| Line | Coverage | Source |
|---|---|---|
| 397 | 1 | (borrow_check_expr( env, assumptions, state, expr, Assignment(place).live_before(env, &state, places_live_on_exit), ) => (value_ty, state)) |
| 406 | 2 | (borrow_check_place_expr( env, assumptions, state, place, ) => (place, state)) |
| 414 | 1 | (prove_assignable(env, assumptions, state, value_ty, &place.ty) => state) |
| 416 | 11 | (access_permitted( env, assumptions, state, Access::new(AccessKind::Write, place), places_live_on_exit, ) => state) |
| 424 | N/A | (let state = kill_loans(place, state)) |
| 425 | N/A | (let state = state.with_initialized(&place.to_place_expression())) |
| ──────── ("assign") | ||
| 427 | 27 | (borrow_check_expr(env, assumptions, state, Expr::Assign { place, expr }, places_live_on_exit) => (Ty::unit(), state)) |
2 tests failed proving this premise:
Source location: tests/mir_typeck.rs:791 (all coverage from this test)
fn foo (v1: u32) -> u32 {
let v2: Dummy = Dummy { value: 1_u32 };
v2.nonexistent = 2_u32;
return v1;
}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 "expr"nll.rs:232borrow_check_expr failednll.rs:371args
rule "assign"nll.rs:406borrow_check_place_expr failednll.rs:668args
rule "struct field"nll.rs:694 (failed: if_false)
Source location: tests/mir_typeck.rs:820 (all coverage from this test)
fn foo (v1: u32) -> u32 {
let v2: Dummy = Dummy { value: 1_u32 };
v1.value = 2_u32;
return v1;
}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 "expr"nll.rs:232borrow_check_expr failednll.rs:371args
rule "assign"nll.rs:406borrow_check_place_expr failednll.rs:668args
rule "struct field"nll.rs:689 (failed: if_let)