Rollup of 18 pull requests #74305

Manishearth · 2020-07-13T21:10:58Z

Successful merges:

Substantial refactor to the design of LineWriter #72808 (Substantial refactor to the design of LineWriter)
rustdoc: insert newlines between attributes #73852 (rustdoc: insert newlines between attributes)
Document the union keyword #73867 (Document the union keyword)
add (unchecked) indexing methods to raw (and NonNull) slices #73986 (add (unchecked) indexing methods to raw (and NonNull) slices)
Fix caching issue when building tools. #74046 (Fix caching issue when building tools.)
clean up E0718 explanation #74123 (clean up E0718 explanation)
rustdoc: Allow linking from private items to private types #74147 (rustdoc: Allow linking from private items to private types)
Detect tuple struct incorrectly used as struct pat #74173 (Detect tuple struct incorrectly used as struct pat)
Don't panic if the lhs of a div by zero is not statically known #74221 (Don't panic if the lhs of a div by zero is not statically known)
Remove an unwrap in layout computation #74227 (Remove an unwrap in layout computation)
Provide structured suggestion on unsized fields and fn params #74228 (Provide structured suggestion on unsized fields and fn params)
Update llvm-project to latest origin/rustc/10.0-2020-05-05 commit #74239 (Update llvm-project to latest origin/rustc/10.0-2020-05-05 commit )
Teach bootstrap about target files vs target triples #74251 (Teach bootstrap about target files vs target triples)
don't mark linux kernel module targets as a unix environment #74257 (don't mark linux kernel module targets as a unix environment)
Slight reorganization of sys/(fast_)thread_local #74263 (Slight reorganization of sys/(fast_)thread_local)
typeck: report placeholder type error w/out span #74270 (typeck: report placeholder type error w/out span)
#71669: add ui, codegen tests for volatile + nearby int intrinsics #74285 (Missing tests for intrinsics. #71669: add ui, codegen tests for volatile + nearby int intrinsics)
Added detailed error code explanation for issue E0688 in Rust compiler. #74286 (Added detailed error code explanation for issue E0688 in Rust compiler.)

Failed merges:

This commit redesigns LineWriter to work more directly on the internals of BufWriter. This interface change is to enable a future Pull Request in which Stdout can be switched between Line and Block buffered mode.

- Added a bunch of new unit tests - Removed test_line_buffer_fail_flush - Updated erroneous_flush_retried - Added helper methods to LineWriterShim for code clarity, to distinguish "self.buffer" (the BufWriter) from self.inner (the thing wrapped by the BufWriter) - Un-expressionized write & write_all - Added clause to bail early on Ok(0)

- Cleaned up BufWriter::seek - Updated line_vectored test - Updated line_vectored_partial_and_errors test - Added several new tests

- Renamed write_to_buffer to write_to_buf, for consistency - Fixed references to flush_buf - Optimized `write` to use one less `memchr` call

- Fixed test after write_vectored bugfix - Some comments

@the8472

- Fixed partial-line buffering issue - Added tests Thanks @the8472 for catching!

Co-authored-by: Josh Triplett <josh@joshtriplett.org>

@rustbot

…riplett Document the union keyword Partial fix of rust-lang#34601. This documents the `union` keyword by presenting three cases: simply using a union, matching on a union and referencing the fields of a union. @rustbot modify labels: T-doc,C-enhancement

@SimonSapin

add (unchecked) indexing methods to raw (and NonNull) slices This complements the existing (unstable) `len` method. Unfortunately, for non-null slices, we cannot call this method `as_ptr` as that overlaps with the existing method of the same name. If this looks reasonable to accept, I propose to reuse the rust-lang#71146 tracking issue and rename the feature get to `slice_ptr_methods` or so. Cc @SimonSapin Fixes rust-lang#60639

…-Simulacrum Fix caching issue when building tools. This fixes a problem with tool builds not being cached properly. rust-lang#73297 changed it so that Clippy will participate in the "deny warnings" setting. Unfortunately this causes a problem because Clippy shares the build directory with other tools which do not participate in "deny warnings". Because Cargo does not independently cache artifacts based on different RUSTFLAGS settings, it causes all the shared dependencies to get rebuilt if Clippy ever gets built. The solution here is to stop using RUSTFLAGS, and just sneak the settings in through the rustc wrapper. Cargo won't know about the different settings, so it will not bust the cache. This should be safe since lint settings on dependencies are ignored. This is how things used to work in the past before rust-lang#64316. Alternate solutions: * Treat Clippy as a "submodule" and don't enforce warnings on it. This was the behavior before rust-lang#73297. The consequence is that if a warning sneaks into clippy, that the clippy maintainers will need to fix it when they sync clippy back to the clippy repo. * Just deny warnings on all tools (removing the in-tree/submodule distinction). This is tempting, but with some issues (cc rust-lang#52336): * Adding or changing warnings in rustc can be difficult to land because tools have to be updated if they trip the warning. In practice, this isn't too bad. Cargo (and rustfmt) already runs with `deny(warnings)`, so this has been the de-facto standard already (although they do not use the extra lints like `unused_lifetimes`). * Teach Cargo to add flags to the workspace members, but not dependencies. * Teach Cargo to add flags without fingerprinting them? * Teach Cargo to independently cache different RUSTFLAGS artifacts (this was [reverted](rust-lang/cargo#7417) due to complications). This would also unnecessarily rebuild dependencies, but would avoid cache thrashing. * Teach Cargo about lint settings. Closes rust-lang#74016

@Dylan-DPC

…kfire clean up E0718 explanation r? @Dylan-DPC

…jyn514 rustdoc: Allow linking from private items to private types Fixes rust-lang#74134 After PR rust-lang#72771 this would trigger an intra_doc_link_resolution_failure warning when rustdoc is invoked without --document-private-items. Links from private items to private types are however never actually generated in that case and thus shouldn't produce a warning. These links are in fact a very useful tool to document crate internals. Tests are added for all 4 combinations of public/private items and link targets. Test 1 is the case mentioned above and fails without this commit. Tests 2 - 4 passed before already but are added nonetheless to prevent regressions.

@petrochenkov

…ochenkov Detect tuple struct incorrectly used as struct pat Subpart of rust-lang#74005. r? @petrochenkov

@wesleywiser

Don't panic if the lhs of a div by zero is not statically known Fixes rust-lang#73993 for real this time r? @wesleywiser

Remove an unwrap in layout computation A tiny improvement.

@davidtwco

Provide structured suggestion on unsized fields and fn params * Suggest borrowing or boxing unsized fields * Suggest borrowing fn parameters * Remove some verbosity of unsized errors * Remove `on_unimplemented` note from `trait Sized` Fix rust-lang#23286, fix rust-lang#28653. r? @davidtwco

Update llvm-project to latest origin/rustc/10.0-2020-05-05 commit which includes LVI segfault fix when building fortanix/rust-sgx#267 And a few earlier commits.

…r=Mark-Simulacrum Teach bootstrap about target files vs target triples `rustc` allows passing in predefined target triples as well as JSON target specification files. This change allows bootstrap to have the first inkling about those differences. This allows building a cross-compiler for an out-of-tree architecture (even though that compiler won't work for other reasons). Even if no one ever uses this functionality, I think the newtype around the `Interned<String>` improves the readability of the code.

@joshtriplett

don't mark linux kernel module targets as a unix environment refs rust-lang#74247 r?@joshtriplett cc: @ehuss

…acrum Slight reorganization of sys/(fast_)thread_local I was long confused by the `thread_local` and `fast_thread_local` modules in the `sys(_common)` part of libstd. The names make it *sound* like `fast_thread_local` is just a faster version of `thread_local`, but really these are totally different APIs: one provides thread-local "keys", which are non-addressable pointer-sized pieces of local storage with an associated destructor; the other (the "fast" one) provides just a destructor. So I propose we rename `fast_thread_local` to `thread_local_dtor`, and `thread_local` to `thread_local_key`. That's what this PR does.

@estebank

…der-type-error, r=estebank typeck: report placeholder type error w/out span Fixes rust-lang#74086. This PR fixes a regression introduced in rust-lang#70369 which meant that an error was not being emitted for invalid placeholder types when there wasn't a span available. r? @estebank

rust-lang#71669: add ui, codegen tests for volatile + nearby int intrinsics Added some tests for intrinsics. See rust-lang#71669.

@GuillaumeGomez

…Gomez Added detailed error code explanation for issue E0688 in Rust compiler. Added proper error explanation for issue E0688 in the Rust compiler. Error Code E0688 Sub Part of Issue rust-lang#61137 r? @GuillaumeGomez

Manishearth · 2020-07-13T21:27:49Z

@rustbot modify labels: +rollup
@bors r+ rollup=never p=5

bors · 2020-07-13T21:27:50Z

📌 Commit b64d6b9 has been approved by Manishearth

bors · 2020-07-13T21:27:51Z

🌲 The tree is currently closed for pull requests below priority 5, this pull request will be tested once the tree is reopened

bors · 2020-07-13T21:28:11Z

⌛ Testing commit b64d6b9 with merge 50ae19316e73c81e2ddc088c199190f3dd85b8e9...

bors · 2020-07-13T21:54:48Z

💔 Test failed - checks-actions

Manishearth · 2020-07-13T22:06:28Z

2020-07-13T21:53:24.5772669Z failures:
2020-07-13T21:53:24.5880703Z 
2020-07-13T21:53:24.5882233Z ---- [ui (nll)] ui/kindck/kindck-impl-type-params.rs stdout ----
2020-07-13T21:53:24.5882642Z diff of stderr:
2020-07-13T21:53:24.5882803Z 
2020-07-13T21:53:24.5883062Z 4	LL |     let a = &t as &dyn Gettable<T>;
2020-07-13T21:53:24.5883808Z 5	   |             ^^ `T` cannot be sent between threads safely
2020-07-13T21:53:24.5884084Z 6	   |
2020-07-13T21:53:24.5890649Z -	   = help: the trait `std::marker::Send` is not implemented for `T`
2020-07-13T21:53:24.5891497Z 8	   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5891844Z 9	   = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5892159Z 10	help: consider restricting type parameter `T`
2020-07-13T21:53:24.5892326Z 
2020-07-13T21:53:24.5892575Z 31	LL |     let a: &dyn Gettable<T> = &t;
2020-07-13T21:53:24.5892867Z 32	   |                               ^^ `T` cannot be sent between threads safely
2020-07-13T21:53:24.5893144Z 33	   |
2020-07-13T21:53:24.5894121Z -	   = help: the trait `std::marker::Send` is not implemented for `T`
2020-07-13T21:53:24.5894460Z 35	   = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5894778Z 36	   = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5895082Z 37	help: consider restricting type parameter `T`
2020-07-13T21:53:24.5895248Z 
2020-07-13T21:53:24.5895366Z 
2020-07-13T21:53:24.5895620Z The actual stderr differed from the expected stderr.
2020-07-13T21:53:24.5896440Z Actual stderr saved to /checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/kindck/kindck-impl-type-params.nll/kindck-impl-type-params.nll.stderr
2020-07-13T21:53:24.5897133Z To update references, rerun the tests and pass the `--bless` flag
2020-07-13T21:53:24.5897807Z To only update this specific test, also pass `--test-args kindck/kindck-impl-type-params.rs`
2020-07-13T21:53:24.5897987Z 
2020-07-13T21:53:24.5898244Z error: 1 errors occurred comparing output.
2020-07-13T21:53:24.5898521Z status: exit code: 1
2020-07-13T21:53:24.5900416Z command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/ui/kindck/kindck-impl-type-params.rs" "-Zthreads=1" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/kindck/kindck-impl-type-params.nll" "-Zborrowck=mir" "-A" "unused" "-Crpath" "-Cdebuginfo=0" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/kindck/kindck-impl-type-params.nll/auxiliary"
2020-07-13T21:53:24.5901106Z stdout:
2020-07-13T21:53:24.5901640Z ------------------------------------------
2020-07-13T21:53:24.5901808Z 
2020-07-13T21:53:24.5902313Z ------------------------------------------
2020-07-13T21:53:24.5902578Z stderr:
2020-07-13T21:53:24.5903300Z ------------------------------------------
2020-07-13T21:53:24.5903596Z error[E0277]: `T` cannot be sent between threads safely
2020-07-13T21:53:24.5904216Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:18:13
2020-07-13T21:53:24.5904499Z    |
2020-07-13T21:53:24.5904748Z LL |     let a = &t as &dyn Gettable<T>;
2020-07-13T21:53:24.5905052Z    |             ^^ `T` cannot be sent between threads safely
2020-07-13T21:53:24.5905320Z    |
2020-07-13T21:53:24.5905595Z    = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5905928Z    = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5906228Z help: consider restricting type parameter `T`
2020-07-13T21:53:24.5906483Z    |
2020-07-13T21:53:24.5906805Z LL | fn f<T: std::marker::Send>(val: T) {
2020-07-13T21:53:24.5907061Z    |       ^^^^^^^^^^^^^^^^^^^
2020-07-13T21:53:24.5907219Z 
2020-07-13T21:53:24.5907541Z error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
2020-07-13T21:53:24.5908172Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:18:13
2020-07-13T21:53:24.5908451Z    |
2020-07-13T21:53:24.5908693Z LL |     let a = &t as &dyn Gettable<T>;
2020-07-13T21:53:24.5909051Z    |             ^^ the trait `std::marker::Copy` is not implemented for `T`
2020-07-13T21:53:24.5909331Z    |
2020-07-13T21:53:24.5909608Z    = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5909932Z    = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5910358Z help: consider restricting type parameter `T`
2020-07-13T21:53:24.5910630Z    |
2020-07-13T21:53:24.5910950Z LL | fn f<T: std::marker::Copy>(val: T) {
2020-07-13T21:53:24.5911211Z    |       ^^^^^^^^^^^^^^^^^^^
2020-07-13T21:53:24.5911352Z 
2020-07-13T21:53:24.5911606Z error[E0277]: `T` cannot be sent between threads safely
2020-07-13T21:53:24.5912249Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:25:31
2020-07-13T21:53:24.5912527Z    |
2020-07-13T21:53:24.5912771Z LL |     let a: &dyn Gettable<T> = &t;
2020-07-13T21:53:24.5913059Z    |                               ^^ `T` cannot be sent between threads safely
2020-07-13T21:53:24.5913358Z    |
2020-07-13T21:53:24.5913631Z    = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5913950Z    = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5914240Z help: consider restricting type parameter `T`
2020-07-13T21:53:24.5914493Z    |
2020-07-13T21:53:24.5914805Z LL | fn g<T: std::marker::Send>(val: T) {
2020-07-13T21:53:24.5915071Z    |       ^^^^^^^^^^^^^^^^^^^
2020-07-13T21:53:24.5915226Z 
2020-07-13T21:53:24.5915538Z error[E0277]: the trait bound `T: std::marker::Copy` is not satisfied
2020-07-13T21:53:24.5916176Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:25:31
2020-07-13T21:53:24.5916447Z    |
2020-07-13T21:53:24.5916688Z LL |     let a: &dyn Gettable<T> = &t;
2020-07-13T21:53:24.5917051Z    |                               ^^ the trait `std::marker::Copy` is not implemented for `T`
2020-07-13T21:53:24.5917368Z    |
2020-07-13T21:53:24.5917642Z    = note: required because of the requirements on the impl of `Gettable<T>` for `S<T>`
2020-07-13T21:53:24.5917954Z    = note: required for the cast to the object type `dyn Gettable<T>`
2020-07-13T21:53:24.5918243Z help: consider restricting type parameter `T`
2020-07-13T21:53:24.5918502Z    |
2020-07-13T21:53:24.5918800Z LL | fn g<T: std::marker::Copy>(val: T) {
2020-07-13T21:53:24.5919071Z    |       ^^^^^^^^^^^^^^^^^^^
2020-07-13T21:53:24.5919227Z 
2020-07-13T21:53:24.5919673Z error[E0277]: the trait bound `std::string::String: std::marker::Copy` is not satisfied
2020-07-13T21:53:24.5920342Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:38:13
2020-07-13T21:53:24.5920620Z    |
2020-07-13T21:53:24.5920874Z LL |     let a = t as Box<dyn Gettable<String>>;
2020-07-13T21:53:24.5921242Z    |             ^ the trait `std::marker::Copy` is not implemented for `std::string::String`
2020-07-13T21:53:24.5921544Z    |
2020-07-13T21:53:24.5922242Z thread 'main' panicked at 'Some tests failed', src/tools/compiletest/src/main.rs:344:22
2020-07-13T21:53:24.5922570Z note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
2020-07-13T21:53:24.5922987Z    = note: required because of the requirements on the impl of `Gettable<std::string::String>` for `S<std::string::String>`
2020-07-13T21:53:24.5923411Z    = note: required for the cast to the object type `dyn Gettable<std::string::String>`
2020-07-13T21:53:24.5923605Z 
2020-07-13T21:53:24.5924222Z error[E0277]: the trait bound `foo3::Foo: std::marker::Copy` is not satisfied
2020-07-13T21:53:24.5924887Z   --> /checkout/src/test/ui/kindck/kindck-impl-type-params.rs:46:37
2020-07-13T21:53:24.5925161Z    |
2020-07-13T21:53:24.5925409Z LL |     let a: Box<dyn Gettable<Foo>> = t;
2020-07-13T21:53:24.5925806Z    |                                     ^ the trait `std::marker::Copy` is not implemented for `foo3::Foo`
2020-07-13T21:53:24.5926091Z    |
2020-07-13T21:53:24.5926423Z    = note: required because of the requirements on the impl of `Gettable<foo3::Foo>` for `S<foo3::Foo>`
2020-07-13T21:53:24.5926804Z    = note: required for the cast to the object type `dyn Gettable<foo3::Foo>`
2020-07-13T21:53:24.5926972Z 
2020-07-13T21:53:24.5927220Z error: aborting due to 6 previous errors
2020-07-13T21:53:24.5927380Z 
2020-07-13T21:53:24.5927976Z For more information about this error, try `rustc --explain E0277`.
2020-07-13T21:53:24.5928266Z 
2020-07-13T21:53:24.5928794Z ------------------------------------------

Lucretiel and others added 30 commits May 31, 2020 00:10

Substantial refactor to the design of LineWriter

37570e8

This commit redesigns LineWriter to work more directly on the internals of BufWriter. This interface change is to enable a future Pull Request in which Stdout can be switched between Line and Block buffered mode.

Updated comments; only pre-flush newline terminated buffers

0f38158

Expressionify LineWriterShim::write

4a1597f

Expressionify write_all

5edad37

x.py fmt

1bf8ba3

Added check for is_write_vectored

e0dfdc6

Add comment describing erroneous_flush_retried

2c3024b

Added test stubs

e89e2e4

Tons of testing updates, other minor changes

b6296e8

- Cleaned up BufWriter::seek - Updated line_vectored test - Updated line_vectored_partial_and_errors test - Added several new tests

Fixed typo in test

e022d34

Code review updates: all minor style fixes

e4328ae

- Renamed write_to_buffer to write_to_buf, for consistency - Fixed references to flush_buf - Optimized `write` to use one less `memchr` call

Add comment

f7650fe

Tidy fixes

7a6a12b

Reimplement flush_buf with a Guard. Longer, but cleaner.

338a2c0

Added comment about BufWrite::write_all

c869638

Improved line_vectored_ignored. Added stylistic semicolon.

61f591e

Fixed bug in write_vectored & empty buffers

2d22c77

Comment updates

2c23b90

Remove inline from write_to_buf

e999ca5

More minor changes

70ba320

- Fixed test after write_vectored bugfix - Some comments

BufWriter::write* methods now use fewer runtime checks

5b1a40c

x.py fix AGAIN

8df5ae0

Fixed corner case related to partial-line buffering

60ab99f

- Fixed partial-line buffering issue - Added tests Thanks @the8472 for catching!

Update comments with relevant issue numbers

38017a3

Clarified comment in partial_multiline_buffering test

59710fb

Document the union keyword

2e21af2

Clarify some parts by applying the suggestions from review

614f773

Co-authored-by: Josh Triplett <josh@joshtriplett.org>

Fix caching issue when building tools.

310c97b

add as_ptr method to raw slices

c478b54

Manishearth added 16 commits July 13, 2020 14:10

Rollup merge of rust-lang#74123 - GuillaumeGomez:cleanup-e0718, r=pic…

06190a4

…kfire clean up E0718 explanation r? @Dylan-DPC

Rollup merge of rust-lang#74173 - estebank:struct-pat-as-enum, r=petr…

548519c

…ochenkov Detect tuple struct incorrectly used as struct pat Subpart of rust-lang#74005. r? @petrochenkov

Rollup merge of rust-lang#74221 - oli-obk:const_prop_ice, r=wesleywiser

03e6b82

Don't panic if the lhs of a div by zero is not statically known Fixes rust-lang#73993 for real this time r? @wesleywiser

Rollup merge of rust-lang#74227 - erikdesjardins:layun, r=estebank

ea37221

Remove an unwrap in layout computation A tiny improvement.

Rollup merge of rust-lang#74239 - AdrianCX:master, r=cuviper

2a36375

Update llvm-project to latest origin/rustc/10.0-2020-05-05 commit which includes LVI segfault fix when building fortanix/rust-sgx#267 And a few earlier commits.

Rollup merge of rust-lang#74257 - alex:patch-1, r=joshtriplett

29a2ccd

don't mark linux kernel module targets as a unix environment refs rust-lang#74247 r?@joshtriplett cc: @ehuss

Rollup merge of rust-lang#74285 - wangtheo:issue-71669, r=lcnr

efa9759

rust-lang#71669: add ui, codegen tests for volatile + nearby int intrinsics Added some tests for intrinsics. See rust-lang#71669.

rustbot added the rollup A PR which is a rollup label Jul 13, 2020

bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Jul 13, 2020

bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Jul 13, 2020

Manishearth mentioned this pull request Jul 13, 2020

Provide structured suggestion on unsized fields and fn params #74228

Merged

Manishearth closed this Jul 13, 2020

Manishearth deleted the rollup-ndderdc branch July 18, 2020 01:14

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Rollup of 18 pull requests #74305

Rollup of 18 pull requests #74305

Manishearth commented Jul 13, 2020

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Manishearth commented Jul 13, 2020

Rollup of 18 pull requests #74305

Rollup of 18 pull requests #74305

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