Negative coverage: borrow_check_loop / loop / premise borrow_check_loop(env, assumptions, state, body, places_live_on_exit) => state
Premise at line 654. Observed failure causes: failed_judgment.
loop| Line | Coverage | Source |
|---|---|---|
| 652 | 9 | (borrow_check_block(env, assumptions, state, body, places_live_on_exit) => state) |
| 654 | 3 | (borrow_check_loop(env, assumptions, state, body, places_live_on_exit) => state) |
| ──────── ("loop") | ||
| 656 | 20 | (borrow_check_loop(env, assumptions, state, body, places_live_on_exit) => state) |
3 tests failed proving this premise:
Source location: tests/borrowck.rs:4326 (all coverage from this test)
fn conditional() -> u32 {
exists<'r0, 'r1, 'r2, 'r3> {
let b: X = X { value: 0_u32 };
let p: &'r0 mut X = &'r1 mut b;
'l: loop {
let now: &'r2 mut X = &'r2 mut *p;
if true {
if true {
let next: &'r3 mut X = next_of::<'r3>(&'r3 mut *now);
p = next;
} else {
}
} else {
break 'l;
}
}
return 0_u32;
}
}
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:312borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "loop"nll.rs:249borrow_check_loop failednll.rs:640args
rule "loop"nll.rs:654borrow_check_loop failednll.rs:640args
rule "fixed-point"nll.rs:660borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)
rule "loop"nll.rs:652borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)
Source location: tests/borrowck.rs:4592 (all coverage from this test)
fn next<'a>(d: &'a mut Decoder) -> &'a u32 {
exists<'r0, 'r1> {
'l: loop {
let buf: &'r0 u32 = fill_buf::<'r0>(&'r0 mut (*d).buf_read);
let s: &'r1 u32 = decode::<'r1>(buf);
if true {
return s;
} else {
}
}
}
}
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:330borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "loop"nll.rs:249borrow_check_loop failednll.rs:640args
rule "loop"nll.rs:654borrow_check_loop failednll.rs:640args
rule "fixed-point"nll.rs:660borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "call"nll.rs:478borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "universal-variable"nll.rs:1490loan_cannot_outlive_universal_regions failednll.rs:1240args
rule "loan_not_required_by_universal_regions"nll.rs:1267 (failed: if_false)
rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)
rule "loop"nll.rs:652borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "call"nll.rs:478borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "universal-variable"nll.rs:1490loan_cannot_outlive_universal_regions failednll.rs:1240args
rule "loan_not_required_by_universal_regions"nll.rs:1267 (failed: if_false)
rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)
Source location: tests/borrowck.rs:4715 (all coverage from this test)
fn next<'s>(f: &'s mut Filter) -> &'s mut u32 {
exists<'r0, 'r1, 'r2> {
'l: loop {
let item: &'r0 mut u32 = iter_next::<'r0>(&'r0 mut (*f).iter);
if true {
let keep: bool = call_predicate::<'r1, 'r2>(&'r1 mut (*f).predicate, &'r2 *item);
if keep {
return item;
} else {
}
} else {
break 'l;
}
}
return no_item::<'s>();
}
}
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:330borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "loop"nll.rs:249borrow_check_loop failednll.rs:640args
rule "loop"nll.rs:654borrow_check_loop failednll.rs:640args
rule "fixed-point"nll.rs:660borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "call"nll.rs:478borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "universal-variable"nll.rs:1490loan_cannot_outlive_universal_regions failednll.rs:1240args
rule "loan_not_required_by_universal_regions"nll.rs:1267 (failed: if_false)
rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)
rule "loop"nll.rs:652borrow_check_block failednll.rs:142args
rule "basic block"nll.rs:157borrow_check_statement failednll.rs:174args
rule "let"nll.rs:189borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "call"nll.rs:478borrow_check_expr_has_ty failednll.rs:350rule "block"nll.rs:363borrow_check_expr failednll.rs:371rule "ref"nll.rs:521access_permitted failednll.rs:862rule "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:1296rule "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 "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 "universal-variable"nll.rs:1490loan_cannot_outlive_universal_regions failednll.rs:1240args
rule "loan_not_required_by_universal_regions"nll.rs:1267 (failed: if_false)
rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:947 (failed: if_let)rule "write-indirect"nll.rs:949 (failed: if_false)