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Rollup merge of #70546 - lqd:polonius_update, r=nikomatsakis

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Polonius: update to 0.12.1, fix more move errors false positives, update test expectations

This PR:
- updates `polonius-engine` to version 0.12.1 to fix some move errors false positives
- fixes a fact generation mistake creating the other move errors false positives
- updates the test expectations for the polonius compare-mode so that all (minus the 2 OOMs) ui tests pass again (matching the [analysis doc](https://hackmd.io/CjYB0fs4Q9CweyeTdKWyEg?view) starting at case 34)

In my opinion, this is safe to rollup.

r? @nikomatsakis
This commit is contained in:
Dylan DPC 2020-03-30 16:24:49 +02:00 committed by GitHub
commit b99db6ee10
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7 changed files with 20 additions and 14 deletions
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4
Cargo.lock
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@ -2522,9 +2522,9 @@ checksum = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
[[package]]
name = "polonius-engine"
version = "0.12.0"
version = "0.12.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "04d8ef65e3f89ecaec9ca7cb0e0911b4617352d4494018bcf934992f03f2024c"
checksum = "ef2558a4b464e185b36ee08a2937ebb62ea5464c38856cfb1465c97cb38db52d"
dependencies = [
"datafrog",
"log",

2
src/librustc_mir/borrow_check/type_check/liveness/polonius.rs
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@ -43,7 +43,7 @@ impl UseFactsExtractor<'_> {
fn insert_path_access(&mut self, path: MovePathIndex, location: Location) {
debug!("UseFactsExtractor::insert_path_access({:?}, {:?})", path, location);
self.path_accessed_at_base.push((path, self.location_table.start_index(location)));
self.path_accessed_at_base.push((path, self.location_to_index(location)));
}
fn place_to_mpi(&self, place: &Place<'_>) -> Option<MovePathIndex> {

6
src/test/ui/closures/closure-expected-type/expect-region-supply-region.polonius.stderr
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@ -2,7 +2,7 @@ error[E0521]: borrowed data escapes outside of closure
--> $DIR/expect-region-supply-region.rs:18:9
|
LL | let mut f: Option<&u32> = None;
| ----- `f` is declared here, outside of the closure body
| ----- `f` declared here, outside of the closure body
LL | closure_expecting_bound(|x| {
| - `x` is a reference that is only valid in the closure body
LL | f = Some(x);
@ -12,7 +12,7 @@ error[E0521]: borrowed data escapes outside of closure
--> $DIR/expect-region-supply-region.rs:28:9
|
LL | let mut f: Option<&u32> = None;
| ----- `f` is declared here, outside of the closure body
| ----- `f` declared here, outside of the closure body
LL | closure_expecting_bound(|x: &u32| {
| - `x` is a reference that is only valid in the closure body
LL | f = Some(x);
@ -33,7 +33,7 @@ error[E0521]: borrowed data escapes outside of closure
--> $DIR/expect-region-supply-region.rs:42:9
|
LL | let mut f: Option<&u32> = None;
| ----- `f` is declared here, outside of the closure body
| ----- `f` declared here, outside of the closure body
...
LL | closure_expecting_bound(|x: &'x u32| {
| - `x` is a reference that is only valid in the closure body

3
src/test/ui/hrtb/hrtb-perfect-forwarding.polonius.stderr
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@ -39,6 +39,7 @@ LL | | // Not OK -- The forwarding impl for `Foo` requires that `Bar` also
... |
LL | | foo_hrtb_bar_not(&mut t);
| | ------------------------ recursive call site
LL | |
LL | | }
| |_^ cannot return without recursing
|
@ -51,7 +52,7 @@ LL | foo_hrtb_bar_not(&mut t);
| ^^^^^^^^^^^^^^^^^^^^^^^^
warning: function cannot return without recursing
--> $DIR/hrtb-perfect-forwarding.rs:49:1
--> $DIR/hrtb-perfect-forwarding.rs:50:1
|
LL | / fn foo_hrtb_bar_hrtb<T>(mut t: T)
LL | | where T : for<'a> Foo<&'a isize> + for<'b> Bar<&'b isize>

7
src/test/ui/impl-trait/multiple-lifetimes/error-handling.polonius.stderr
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@ -1,10 +1,13 @@
error: lifetime may not live long enough
--> $DIR/error-handling.rs:13:56
--> $DIR/error-handling.rs:23:16
|
LL | fn foo<'a, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> {
| -- -- lifetime `'b` defined here ^^^^^^^^^ opaque type requires that `'a` must outlive `'b`
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
...
LL | let _: &'b i32 = *u.0;
| ^^^^^^^ type annotation requires that `'a` must outlive `'b`
|
= help: consider adding the following bound: `'a: 'b`

10
src/test/ui/nll/outlives-suggestion-simple.polonius.stderr
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@ -72,6 +72,8 @@ LL | (x, x)
|
= help: consider adding the following bound: `'a: 'c`
help: add bound `'a: 'b + 'c`
error: lifetime may not live long enough
--> $DIR/outlives-suggestion-simple.rs:31:9
|
@ -106,16 +108,16 @@ LL | self.x
|
= help: consider adding the following bound: `'b: 'a`
error[E0521]: borrowed data escapes outside of function
error[E0521]: borrowed data escapes outside of associated function
--> $DIR/outlives-suggestion-simple.rs:73:9
|
LL | fn get_bar(&self) -> Bar2 {
| -----
| |
| `self` is declared here, outside of the function body
| `self` is a reference that is only valid in the function body
| `self` declared here, outside of the associated function body
| `self` is a reference that is only valid in the associated function body
LL | Bar2::new(&self)
| ^^^^^^^^^^^^^^^^ `self` escapes the function body here
| ^^^^^^^^^^^^^^^^ `self` escapes the associated function body here
error: aborting due to 10 previous errors

2
src/test/ui/nll/user-annotations/closure-substs.polonius.stderr
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@ -50,7 +50,7 @@ error[E0521]: borrowed data escapes outside of closure
--> $DIR/closure-substs.rs:29:9
|
LL | |x: &i32, b: fn(&'static i32)| {
| - - `b` is declared here, outside of the closure body
| - - `b` declared here, outside of the closure body
| |
| `x` is a reference that is only valid in the closure body
LL | b(x);