Error for RPIT if they are not defined during MIR borrowck #125285

spastorino · 2024-05-19T18:21:57Z

There are some changes in tests that we would need to properly review. I've left some comments on each of them.

spastorino · 2024-05-19T18:23:06Z

tests/ui/impl-trait/divergence.rs

 fn foo() -> impl MyTrait {
+    //~^ ERROR: the trait bound `(): MyTrait` is not satisfied [E0277]


This is unfortunate but not sure how much we should care about this.

spastorino · 2024-05-19T18:24:13Z

tests/ui/impl-trait/impl_fn_associativity.rs

@@ -7,6 +6,7 @@ fn f_debug() -> impl Fn() -> impl Debug {
 }

 fn ff_debug() -> impl Fn() -> impl Fn() -> impl Debug {
+    //~^ ERROR: expected a `Fn()` closure, found `()` [E0277]


I'd need to properly check what's going on here but at a glance this regression seems wrong?

spastorino · 2024-05-19T18:24:36Z

tests/ui/impl-trait/nested_impl_trait.rs

    vec![|| println!("woot")].into_iter()
 }

 fn allowed_in_ret_type() -> impl Fn() -> impl Into<u32> {
+    //~^ ERROR: the trait bound `u32: From<()>` is not satisfied [E0277]


This is the only relevant change as the rest is rustfmt and seems fine.

spastorino · 2024-05-19T18:24:54Z

tests/ui/lint/unused/unused-supertrait.rs

@@ -1,11 +1,11 @@
 #![deny(unused_must_use)]

 fn it() -> impl ExactSizeIterator<Item = ()> {
+    //~^ ERROR the trait bound `(): ExactSizeIterator` is not satisfied [E0277]


This seems like a diagnostics regression.

compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs

spastorino · 2024-05-20T19:51:32Z

This is going to fail on https://github.com/rust-lang/rust/blob/master/tests/ui/impl-trait/in-trait/suggest-missing-item.fixed#L21 as cargo fix is going to add impls with todo!() for traits' methods which their return type is impl Trait, so it will produce a fixed rust file that is not going to compile.

spastorino · 2024-05-20T19:55:05Z

@bors try

…ode, r=<try> Error for RPIT if they are not defined during MIR borrowck r? `@lcnr` Fixes rust-lang#112417 There are some changes in tests that we would need to properly review. I've left some comments on each of them.

bors · 2024-05-20T19:56:18Z

⌛ Trying commit c130bfb with merge 5ff4501...

rust-log-analyzer · 2024-05-20T20:07:38Z

The job x86_64-gnu-tools failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)


     Running tests/compile-test.rs (obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/compile_test-e0af1f18c1597357)

FAILED TEST: tests/ui/new_ret_no_self.rs
command: CLIPPY_CONF_DIR="tests" RUSTC_ICE="0" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/clippy-driver" "--error-format=json" "--emit=metadata" "-Aunused" "-Ainternal_features" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Dwarnings" "-Ldependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps" "--extern=clippy_config=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libclippy_config-c5e0235647f00232.rlib" "--extern=clippy_lints=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libclippy_lints-2964c17de9728d6a.rlib" "--extern=clippy_utils=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libclippy_utils-e7859c049d6fc5af.rlib" "--extern=futures=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libfutures-e1fa4d45c0e68db6.rlib" "--extern=if_chain=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libif_chain-ae846d6788d6a9f1.rlib" "--extern=itertools=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libitertools-e9aa61e1e4ee057e.rlib" "--extern=parking_lot=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libparking_lot-3864f64671f03a2f.rlib" "--extern=quote=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libquote-facaf493acd2f9ad.rlib" "--extern=regex=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libregex-5689c7175177147d.rlib" "--extern=serde=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libserde-d199b1d0494505d0.rlib" "--extern=serde_derive=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/release/deps/libserde_derive-82c47a8e64b8c220.so" "--extern=syn=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libsyn-f7a5efbd7c1bc532.rlib" "--extern=tokio=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/x86_64-unknown-linux-gnu/release/deps/libtokio-e9d338b744af34e7.rlib" "-Ldependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/release/deps" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools/ui_test/tests/ui" "tests/ui/new_ret_no_self.rs" "--edition" "2021"
error: actual output differed from expected
Execute `cargo uibless` to update `tests/ui/new_ret_no_self.stderr` to the actual output
--- tests/ui/new_ret_no_self.stderr
+++ <stderr output>
+++ <stderr output>
-error: methods called `new` usually return `Self`
-  --> tests/ui/new_ret_no_self.rs:50:5
+  --> tests/ui/new_ret_no_self.rs:393:25
    |
    |
-LL | /     pub fn new(_: String) -> impl R<Item = u32> {
+LL |         fn new(t: T) -> impl Trait2<(), Self> {
+   |                         ^^^^^^^^^^^^^^^^^^^^^
 
 
-error: methods called `new` usually return `Self`
-  --> tests/ui/new_ret_no_self.rs:84:5
+  --> tests/ui/new_ret_no_self.rs:402:25
    |
-LL | /     pub fn new() -> u32 {
-LL | /     pub fn new() -> u32 {
+LL |         fn new(t: T) -> impl Trait2<(), i32> {
+   |                         ^^^^^^^^^^^^^^^^^^^^
 
 
-error: methods called `new` usually return `Self`
 
 
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /     pub fn new() -> (u32, u32) {
-LL | |         unimplemented!();
-LL | |     }
-   | |_____^
-
-
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /     pub fn new() -> *mut V {
-LL | |         unimplemented!();
-LL | |     }
-   | |_____^
-
-
-error: methods called `new` usually return `Self`
-   |
-LL | /     pub fn new() -> Option<u32> {
-LL | |
-LL | |         unimplemented!();
-LL | |         unimplemented!();
-LL | |     }
-   | |_____^
-
-error: methods called `new` usually return `Self`
-   |
-LL |         fn new() -> String;
-   |         ^^^^^^^^^^^^^^^^^^^
-
-
-error: methods called `new` usually return `Self`
-   |
-LL |         fn new(_: String) -> String;
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /         fn new() -> (u32, u32) {
-LL | |             unimplemented!();
-LL | |         }
-   | |_________^
-
-
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /         fn new() -> *mut V {
-LL | |             unimplemented!();
-LL | |         }
-   | |_________^
-
-
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /         fn new(t: T) -> impl Into<i32> {
-LL | |             1
-LL | |         }
-   | |_________^
-
-
-error: methods called `new` usually return `Self`
-   |
-   |
-LL | /         fn new(t: T) -> impl Trait2<(), i32> {
-LL | |             unimplemented!()
-LL | |         }
-   | |_________^
-
-
-error: aborting due to 12 previous errors
-


error: `methods called `new` usually return `Self`` not found in diagnostics on line 50
   |
   |
51 |         //~^ ERROR: methods called `new` usually return `Self`
   |


error: ``-D clippy::new-ret-no-self` implied by `-D warnings`` not found in diagnostics on line 50
   |
   |
52 |         //~| NOTE: `-D clippy::new-ret-no-self` implied by `-D warnings`
   |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 84
   |
   |
85 |         //~^ ERROR: methods called `new` usually return `Self`
   |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 94
   |
   |
95 |         //~^ ERROR: methods called `new` usually return `Self`
   |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 131
    |
    |
132 |         //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 159
    |
    |
160 |         //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 178
    |
    |
179 |         //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 232
    |
    |
233 |         //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 245
    |
    |
246 |         //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 281
    |
    |
282 |             //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 309
    |
    |
310 |             //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 380
    |
    |
381 |             //~^ ERROR: methods called `new` usually return `Self`
    |


error: `methods called `new` usually return `Self`` not found in diagnostics on line 402
    |
    |
403 |             //~^ ERROR: methods called `new` usually return `Self`
    |

full stderr:
error: undefined opaque type
error: undefined opaque type
##[error]  --> tests/ui/new_ret_no_self.rs:393:25
   |
LL |         fn new(t: T) -> impl Trait2<(), Self> {

error: undefined opaque type
##[error]  --> tests/ui/new_ret_no_self.rs:402:25
   |
   |
LL |         fn new(t: T) -> impl Trait2<(), i32> {

error: aborting due to 2 previous errors

bors · 2024-05-20T21:38:48Z

☀️ Try build successful - checks-actions
Build commit: 5ff4501 (5ff4501f5e4c740f37756a1102c0b794291dddaf)

spastorino · 2024-05-20T22:15:48Z

@craterbot check

craterbot · 2024-05-20T22:15:54Z

👌 Experiment pr-125285 created and queued.
🤖 Automatically detected try build 5ff4501
🔍 You can check out the queue and this experiment's details.

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

craterbot · 2024-05-23T05:46:56Z

🚧 Experiment pr-125285 is now running

ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

craterbot · 2024-05-25T02:37:34Z

🎉 Experiment pr-125285 is completed!
📊 502 regressed and 6 fixed (464331 total)
📰 Open the full report.

⚠️ If you notice any spurious failure please add them to the blacklist!
ℹ️ Crater is a tool to run experiments across parts of the Rust ecosystem. Learn more

spastorino · 2024-06-17T19:52:19Z

This breaks the usage of todo!(), panic!() and unimplemented!() in some crates so not a good idea.

Add tests for unchecked region constraints for opaque types in dead code

1e7db2c

rustbot assigned lcnr May 19, 2024

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels May 19, 2024

spastorino commented May 19, 2024

View reviewed changes

spastorino force-pushed the unchk-region-opaque-deadcode branch from 854e723 to 6a7ad4c Compare May 19, 2024 18:34

lcnr reviewed May 19, 2024

View reviewed changes

compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs Outdated Show resolved Hide resolved

spastorino force-pushed the unchk-region-opaque-deadcode branch from 6a7ad4c to 3e009ba Compare May 20, 2024 19:26

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If MIR doesn't define the opaque also fail for RPITs

c130bfb

spastorino force-pushed the unchk-region-opaque-deadcode branch from 3e009ba to c130bfb Compare May 20, 2024 19:50

craterbot added S-waiting-on-crater Status: Waiting on a crater run to be completed. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 20, 2024

craterbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-crater Status: Waiting on a crater run to be completed. labels May 25, 2024

spastorino closed this Jun 17, 2024

spastorino mentioned this pull request Jun 28, 2024

error: internal compiler error: compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs:486:17: cannot relate region: LUB('{erased}, '{erased}) #127033

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Error for RPIT if they are not defined during MIR borrowck #125285

Error for RPIT if they are not defined during MIR borrowck #125285

spastorino commented May 19, 2024 •

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spastorino commented Jun 17, 2024

		fn foo() -> impl MyTrait {
		//~^ ERROR: the trait bound `(): MyTrait` is not satisfied [E0277]

Error for RPIT if they are not defined during MIR borrowck #125285

Error for RPIT if they are not defined during MIR borrowck #125285

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