Negative coverage: borrow_check_expr_has_ty / block / premise prove_assignable(env, assumptions, state, ty_expr, ty) => state
Premise at line 365. Observed failure causes: failed_judgment.
block| Line | Coverage | Source |
|---|---|---|
| 364 | 28 | (borrow_check_expr(env, assumptions, state, expr, places_live_on_exit) => (ty_expr, state)) |
| 365 | 4 | (prove_assignable(env, assumptions, state, ty_expr, ty) => state) |
| ──────── ("block") | ||
| 367 | 89 | (borrow_check_expr_has_ty(env, assumptions, state, expr, ty, places_live_on_exit) => state) |
4 tests failed proving this premise:
Source location: tests/borrowck.rs:2986
fn foo<'a, 'b>(a: &'a u32) -> &'b u32 {
let r: &'b u32 = identity::<&'b u32>(a);
return r;
}Failed proof tree
check_all_crates failedmod.rs:41args
rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60args
rule "check crate"mod.rs:73check_crate_item failedmod.rs:178rule "free fn"mod.rs:206check_free_fn failedfns.rs:14args
rule "check free fn"fns.rs:24check_fn failedfns.rs:31args
rule "check fn"fns.rs:55check_fn_body failedfns.rs:62args
rule "expr fn body"fns.rs:90borrow_check failednll.rs:127args
rule "borrow_check"nll.rs:138borrow_check_block failednll.rs:145rule "basic block"nll.rs:160borrow_check_statement failednll.rs:177args
rule "let"nll.rs:194borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:364borrow_check_expr failednll.rs:372args
rule "call"nll.rs:443borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085verify_universal_outlives failedoutlives.rs:8args
rule "verify_universal_outlives"outlives.rs:20only_assumed_outlives failedoutlives.rs:27args
rule "universal lifetime"outlives.rs:49can_outlive failedoutlives.rs:56args
rule "universal target"outlives.rs:81prove failedoutlives.rs:81args
ruleoutlives.rs:81prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "outlives"prove_wc.rs:152prove_outlives failedprove_outlives.rs:8args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085verify_universal_outlives failedoutlives.rs:8args
rule "verify_universal_outlives"outlives.rs:20only_assumed_outlives failedoutlives.rs:27args
rule "universal lifetime"outlives.rs:49can_outlive failedoutlives.rs:56args
rule "universal target"outlives.rs:81prove failedoutlives.rs:81args
ruleoutlives.rs:81prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "outlives"prove_wc.rs:152prove_outlives failedprove_outlives.rs:8args
Source location: tests/mir_typeck.rs:300
fn bar(v1: ()) -> () {
let v0: () = foo(v1);
return v0;
}Failed proof tree
check_all_crates failedmod.rs:41args
rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60args
rule "check crate"mod.rs:73check_crate_item failedmod.rs:178rule "free fn"mod.rs:206check_free_fn failedfns.rs:14args
rule "check free fn"fns.rs:24check_fn failedfns.rs:31args
rule "check fn"fns.rs:55check_fn_body failedfns.rs:62args
rule "expr fn body"fns.rs:90borrow_check failednll.rs:127args
rule "borrow_check"nll.rs:138borrow_check_block failednll.rs:145rule "basic block"nll.rs:160borrow_check_statement failednll.rs:177args
rule "let"nll.rs:194borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:364borrow_check_expr failednll.rs:372args
rule "call"nll.rs:443borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085prove failedfunction.rs:250args
rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "subtype"prove_wc.rs:131prove_sub failedprove_sub.rs:12args
rule "normalize-l"prove_sub.rs:27prove_normalize failedprove_normalize.rs:20args
rule "normalize-r"prove_sub.rs:34prove_normalize failedprove_normalize.rs:20args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085prove failedfunction.rs:250args
rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "subtype"prove_wc.rs:131prove_sub failedprove_sub.rs:12args
rule "normalize-l"prove_sub.rs:27prove_normalize failedprove_normalize.rs:20args
rule "normalize-r"prove_sub.rs:34prove_normalize failedprove_normalize.rs:20args
Source location: tests/mir_typeck.rs:360
fn bar(v1: u32) -> u32 {
let v0: u32 = identity::<bool>(v1);
return v0;
}Failed proof tree
check_all_crates failedmod.rs:41args
rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60args
rule "check crate"mod.rs:73check_crate_item failedmod.rs:178rule "free fn"mod.rs:206check_free_fn failedfns.rs:14args
rule "check free fn"fns.rs:24check_fn failedfns.rs:31args
rule "check fn"fns.rs:55check_fn_body failedfns.rs:62args
rule "expr fn body"fns.rs:90borrow_check failednll.rs:127args
rule "borrow_check"nll.rs:138borrow_check_block failednll.rs:145rule "basic block"nll.rs:160borrow_check_statement failednll.rs:177args
rule "let"nll.rs:194borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:364borrow_check_expr failednll.rs:372args
rule "call"nll.rs:443borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085prove failedfunction.rs:250args
rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "subtype"prove_wc.rs:131prove_sub failedprove_sub.rs:12args
rule "normalize-l"prove_sub.rs:27prove_normalize failedprove_normalize.rs:20args
rule "normalize-r"prove_sub.rs:34prove_normalize failedprove_normalize.rs:20args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085prove failedfunction.rs:250args
rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "subtype"prove_wc.rs:131prove_sub failedprove_sub.rs:12args
rule "normalize-l"prove_sub.rs:27prove_normalize failedprove_normalize.rs:20args
rule "normalize-r"prove_sub.rs:34prove_normalize failedprove_normalize.rs:20args
Source location: tests/mir_typeck.rs:630
fn foo (v1: u32) -> u32 {
let v2: Dummy = Dummy { value: false };
return v1;
}Failed proof tree
check_all_crates failedmod.rs:41args
rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60args
rule "check crate"mod.rs:73check_crate_item failedmod.rs:178rule "free fn"mod.rs:206check_free_fn failedfns.rs:14args
rule "check free fn"fns.rs:24check_fn failedfns.rs:31args
rule "check fn"fns.rs:55check_fn_body failedfns.rs:62args
rule "expr fn body"fns.rs:90borrow_check failednll.rs:127args
rule "borrow_check"nll.rs:138borrow_check_block failednll.rs:145rule "basic block"nll.rs:160borrow_check_statement failednll.rs:177args
rule "let"nll.rs:194borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:364borrow_check_expr failednll.rs:372args
rule "struct"nll.rs:564borrow_check_expr_has_ty failednll.rs:351args
rule "block"nll.rs:365prove_assignable failednll.rs:1067args
rule "subtype"nll.rs:1085prove failedfunction.rs:250args
rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:8args
rule "some"prove_wc_list.rs:26prove_wc failedprove_wc.rs:21args
rule "subtype"prove_wc.rs:131prove_sub failedprove_sub.rs:12args
rule "normalize-l"prove_sub.rs:27prove_normalize failedprove_normalize.rs:20args
rule "normalize-r"prove_sub.rs:34prove_normalize failedprove_normalize.rs:20args