Auto merge of #88615 - flip1995:clippyup, r=Manishearth

Update Clippy

r? `@Manishearth`

Author: bors

Diff for: Cargo.lock

@@ -293,7 +293,7 @@ dependencies = [
  "humantime 2.0.1",
  "ignore",
  "im-rc",
- "itertools 0.10.0",
+ "itertools 0.10.1",
  "jobserver",
  "lazy_static",
  "lazycell",
@@ -388,7 +388,7 @@ dependencies = [
  "flate2",
  "git2",
  "glob",
- "itertools 0.10.0",
+ "itertools 0.10.1",
  "lazy_static",
  "remove_dir_all",
  "serde_json",
@@ -554,13 +554,16 @@ dependencies = [
 
 [[package]]
 name = "clippy"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "cargo_metadata 0.12.0",
  "clippy_lints",
+ "clippy_utils",
  "compiletest_rs 0.6.0",
  "derive-new",
  "filetime",
+ "if_chain",
+ "itertools 0.10.1",
  "quote",
  "regex",
  "rustc-workspace-hack",
@@ -587,7 +590,7 @@ dependencies = [
 
 [[package]]
 name = "clippy_lints"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "cargo_metadata 0.12.0",
  "clippy_utils",
@@ -608,14 +611,10 @@ dependencies = [
 
 [[package]]
 name = "clippy_utils"
-version = "0.1.56"
+version = "0.1.57"
 dependencies = [
  "if_chain",
- "itertools 0.9.0",
- "regex-syntax",
  "rustc-semver",
- "serde",
- "unicode-normalization",
 ]
 
 [[package]]
@@ -1744,9 +1743,9 @@ dependencies = [
 
 [[package]]
 name = "itertools"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37d572918e350e82412fe766d24b15e6682fb2ed2bbe018280caa810397cb319"
+checksum = "69ddb889f9d0d08a67338271fa9b62996bc788c7796a5c18cf057420aaed5eaf"
 dependencies = [
  "either",
 ]

Diff for: src/tools/clippy/.cargo/config

@@ -5,4 +5,5 @@ lintcheck = "run --target-dir lintcheck/target --package lintcheck --bin lintche
 collect-metadata = "test --test dogfood --features metadata-collector-lint -- run_metadata_collection_lint --ignored"
 
 [build]
-rustflags = ["-Zunstable-options"]
+# -Zbinary-dep-depinfo allows us to track which rlib files to use for compiling UI tests
+rustflags = ["-Zunstable-options", "-Zbinary-dep-depinfo"]

Diff for: src/tools/clippy/.github/ISSUE_TEMPLATE/blank_issue.md

@@ -2,3 +2,17 @@
 name: Blank Issue
 about: Create a blank issue.
 ---
+
+
+<!--
+Additional labels can be added to this issue by including the following command
+(without the space after the @ symbol):
+
+`@rustbot label +<label>`
+
+Common labels for this issue type are:
+* C-an-interesting-project
+* C-enhancement
+* C-question
+* C-tracking-issue
+-->

Diff for: src/tools/clippy/.github/ISSUE_TEMPLATE/bug_report.md

@@ -20,28 +20,24 @@ Instead, this happened: *explanation*
 
 ### Meta
 
-- `cargo clippy -V`: e.g. clippy 0.0.212 (f455e46 2020-06-20)
-- `rustc -Vv`:
-  ```
-  rustc 1.46.0-nightly (f455e46ea 2020-06-20)
-  binary: rustc
-  commit-hash: f455e46eae1a227d735091091144601b467e1565
-  commit-date: 2020-06-20
-  host: x86_64-unknown-linux-gnu
-  release: 1.46.0-nightly
-  LLVM version: 10.0
-  ```
+**Rust version (`rustc -Vv`):**
+
+```
+rustc 1.46.0-nightly (f455e46ea 2020-06-20)
+binary: rustc
+commit-hash: f455e46eae1a227d735091091144601b467e1565
+commit-date: 2020-06-20
+host: x86_64-unknown-linux-gnu
+release: 1.46.0-nightly
+LLVM version: 10.0
+```
 
 <!--
-Include a backtrace in the code block by setting `RUST_BACKTRACE=1` in your
-environment. E.g. `RUST_BACKTRACE=1 cargo clippy`.
+Additional labels can be added to this issue by including the following command
+(without the space after the @ symbol):
+
+`@rustbot label +<label>`
+
+Common labels for this issue type are:
+* `I-suggestion-causes-error`
 -->
-<details><summary>Backtrace</summary>
-  <p>
-  
-  ```
-  <backtrace>
-  ```
-  
-  </p>
-</details>

Diff for: src/tools/clippy/.github/ISSUE_TEMPLATE/false_negative.md

@@ -22,14 +22,14 @@ Instead, this happened: *explanation*
 
 ### Meta
 
-- `cargo clippy -V`: e.g. clippy 0.0.212 (f455e46 2020-06-20)
-- `rustc -Vv`:
-  ```
-  rustc 1.46.0-nightly (f455e46ea 2020-06-20)
-  binary: rustc
-  commit-hash: f455e46eae1a227d735091091144601b467e1565
-  commit-date: 2020-06-20
-  host: x86_64-unknown-linux-gnu
-  release: 1.46.0-nightly
-  LLVM version: 10.0
-  ```
+**Rust version (`rustc -Vv`):**
+
+```
+rustc 1.46.0-nightly (f455e46ea 2020-06-20)
+binary: rustc
+commit-hash: f455e46eae1a227d735091091144601b467e1565
+commit-date: 2020-06-20
+host: x86_64-unknown-linux-gnu
+release: 1.46.0-nightly
+LLVM version: 10.0
+```

Diff for: src/tools/clippy/.github/ISSUE_TEMPLATE/false_positive.md

@@ -22,14 +22,23 @@ Instead, this happened: *explanation*
 
 ### Meta
 
-- `cargo clippy -V`: e.g. clippy 0.0.212 (f455e46 2020-06-20)
-- `rustc -Vv`:
-  ```
-  rustc 1.46.0-nightly (f455e46ea 2020-06-20)
-  binary: rustc
-  commit-hash: f455e46eae1a227d735091091144601b467e1565
-  commit-date: 2020-06-20
-  host: x86_64-unknown-linux-gnu
-  release: 1.46.0-nightly
-  LLVM version: 10.0
-  ```
+**Rust version (`rustc -Vv`):**
+```
+rustc 1.46.0-nightly (f455e46ea 2020-06-20)
+binary: rustc
+commit-hash: f455e46eae1a227d735091091144601b467e1565
+commit-date: 2020-06-20
+host: x86_64-unknown-linux-gnu
+release: 1.46.0-nightly
+LLVM version: 10.0
+```
+
+<!--
+Additional labels can be added to this issue by including the following command
+(without the space after the @ symbol):
+
+`@rustbot label +<label>`
+
+Common labels for this issue type are:
+* I-suggestion-causes-error
+-->

Diff for: src/tools/clippy/.github/ISSUE_TEMPLATE/ice.md

@@ -20,17 +20,16 @@ http://blog.pnkfx.org/blog/2019/11/18/rust-bug-minimization-patterns/
 
 ### Meta
 
-- `cargo clippy -V`: e.g. clippy 0.0.212 (f455e46 2020-06-20)
-- `rustc -Vv`:
-  ```
-  rustc 1.46.0-nightly (f455e46ea 2020-06-20)
-  binary: rustc
-  commit-hash: f455e46eae1a227d735091091144601b467e1565
-  commit-date: 2020-06-20
-  host: x86_64-unknown-linux-gnu
-  release: 1.46.0-nightly
-  LLVM version: 10.0
-  ```
+**Rust version (`rustc -Vv`):**
+```
+rustc 1.46.0-nightly (f455e46ea 2020-06-20)
+binary: rustc
+commit-hash: f455e46eae1a227d735091091144601b467e1565
+commit-date: 2020-06-20
+host: x86_64-unknown-linux-gnu
+release: 1.46.0-nightly
+LLVM version: 10.0
+```
 
 ### Error output
 

Diff for: src/tools/clippy/.github/workflows/clippy_dev.yml

@@ -42,9 +42,6 @@ jobs:
       run: cargo build --features deny-warnings
       working-directory: clippy_dev
 
-    - name: Test limit_stderr_length
-      run: cargo dev limit_stderr_length
-
     - name: Test update_lints
       run: cargo dev update_lints --check
 

Diff for: src/tools/clippy/CHANGELOG.md

@@ -964,7 +964,7 @@ Released 2020-11-19
   [#5907](https://github.com/rust-lang/rust-clippy/pull/5907)
 * [`suspicious_arithmetic_impl`]: extend to implementations of `BitAnd`, `BitOr`, `BitXor`, `Rem`, `Shl`, and `Shr`
   [#5884](https://github.com/rust-lang/rust-clippy/pull/5884)
-* [`invalid_atomic_ordering`]: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
+* `invalid_atomic_ordering`: detect misuse of `compare_exchange`, `compare_exchange_weak`, and `fetch_update`
   [#6025](https://github.com/rust-lang/rust-clippy/pull/6025)
 * Avoid [`redundant_pattern_matching`] triggering in macros
   [#6069](https://github.com/rust-lang/rust-clippy/pull/6069)
@@ -1451,7 +1451,7 @@ Released 2020-03-12
 * [`option_as_ref_deref`] [#4945](https://github.com/rust-lang/rust-clippy/pull/4945)
 * [`wildcard_in_or_patterns`] [#4960](https://github.com/rust-lang/rust-clippy/pull/4960)
 * [`iter_nth_zero`] [#4966](https://github.com/rust-lang/rust-clippy/pull/4966)
-* [`invalid_atomic_ordering`] [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
+* `invalid_atomic_ordering` [#4999](https://github.com/rust-lang/rust-clippy/pull/4999)
 * [`skip_while_next`] [#5067](https://github.com/rust-lang/rust-clippy/pull/5067)
 
 ### Moves and Deprecations
@@ -2613,6 +2613,7 @@ Released 2018-09-13
 [`deprecated_cfg_attr`]: https://rust-lang.github.io/rust-clippy/master/index.html#deprecated_cfg_attr
 [`deprecated_semver`]: https://rust-lang.github.io/rust-clippy/master/index.html#deprecated_semver
 [`deref_addrof`]: https://rust-lang.github.io/rust-clippy/master/index.html#deref_addrof
+[`derivable_impls`]: https://rust-lang.github.io/rust-clippy/master/index.html#derivable_impls
 [`derive_hash_xor_eq`]: https://rust-lang.github.io/rust-clippy/master/index.html#derive_hash_xor_eq
 [`derive_ord_xor_partial_ord`]: https://rust-lang.github.io/rust-clippy/master/index.html#derive_ord_xor_partial_ord
 [`disallowed_method`]: https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_method
@@ -2712,7 +2713,6 @@ Released 2018-09-13
 [`integer_arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#integer_arithmetic
 [`integer_division`]: https://rust-lang.github.io/rust-clippy/master/index.html#integer_division
 [`into_iter_on_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
-[`invalid_atomic_ordering`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_atomic_ordering
 [`invalid_null_ptr_usage`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_null_ptr_usage
 [`invalid_regex`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_regex
 [`invalid_upcast_comparisons`]: https://rust-lang.github.io/rust-clippy/master/index.html#invalid_upcast_comparisons
@@ -2754,6 +2754,7 @@ Released 2018-09-13
 [`manual_ok_or`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_ok_or
 [`manual_range_contains`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_contains
 [`manual_saturating_arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_saturating_arithmetic
+[`manual_split_once`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_split_once
 [`manual_str_repeat`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_str_repeat
 [`manual_strip`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_strip
 [`manual_swap`]: https://rust-lang.github.io/rust-clippy/master/index.html#manual_swap
@@ -2795,6 +2796,7 @@ Released 2018-09-13
 [`missing_safety_doc`]: https://rust-lang.github.io/rust-clippy/master/index.html#missing_safety_doc
 [`mistyped_literal_suffixes`]: https://rust-lang.github.io/rust-clippy/master/index.html#mistyped_literal_suffixes
 [`mixed_case_hex_literals`]: https://rust-lang.github.io/rust-clippy/master/index.html#mixed_case_hex_literals
+[`mod_module_files`]: https://rust-lang.github.io/rust-clippy/master/index.html#mod_module_files
 [`module_inception`]: https://rust-lang.github.io/rust-clippy/master/index.html#module_inception
 [`module_name_repetitions`]: https://rust-lang.github.io/rust-clippy/master/index.html#module_name_repetitions
 [`modulo_arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#modulo_arithmetic
@@ -2821,13 +2823,15 @@ Released 2018-09-13
 [`needless_doctest_main`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_doctest_main
 [`needless_for_each`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_for_each
 [`needless_lifetimes`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
+[`needless_option_as_deref`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_option_as_deref
 [`needless_pass_by_value`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_value
 [`needless_question_mark`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_question_mark
 [`needless_range_loop`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
 [`needless_return`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
 [`needless_update`]: https://rust-lang.github.io/rust-clippy/master/index.html#needless_update
 [`neg_cmp_op_on_partial_ord`]: https://rust-lang.github.io/rust-clippy/master/index.html#neg_cmp_op_on_partial_ord
 [`neg_multiply`]: https://rust-lang.github.io/rust-clippy/master/index.html#neg_multiply
+[`negative_feature_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#negative_feature_names
 [`never_loop`]: https://rust-lang.github.io/rust-clippy/master/index.html#never_loop
 [`new_ret_no_self`]: https://rust-lang.github.io/rust-clippy/master/index.html#new_ret_no_self
 [`new_without_default`]: https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
@@ -2881,6 +2885,7 @@ Released 2018-09-13
 [`redundant_closure_call`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_call
 [`redundant_closure_for_method_calls`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure_for_method_calls
 [`redundant_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_else
+[`redundant_feature_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_feature_names
 [`redundant_field_names`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
 [`redundant_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern
 [`redundant_pattern_matching`]: https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
@@ -2903,6 +2908,7 @@ Released 2018-09-13
 [`search_is_some`]: https://rust-lang.github.io/rust-clippy/master/index.html#search_is_some
 [`self_assignment`]: https://rust-lang.github.io/rust-clippy/master/index.html#self_assignment
 [`self_named_constructors`]: https://rust-lang.github.io/rust-clippy/master/index.html#self_named_constructors
+[`self_named_module_files`]: https://rust-lang.github.io/rust-clippy/master/index.html#self_named_module_files
 [`semicolon_if_nothing_returned`]: https://rust-lang.github.io/rust-clippy/master/index.html#semicolon_if_nothing_returned
 [`serde_api_misuse`]: https://rust-lang.github.io/rust-clippy/master/index.html#serde_api_misuse
 [`shadow_reuse`]: https://rust-lang.github.io/rust-clippy/master/index.html#shadow_reuse

Diff for: src/tools/clippy/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "clippy"
-version = "0.1.56"
+version = "0.1.57"
 description = "A bunch of helpful lints to avoid common pitfalls in Rust"
 repository = "https://github.com/rust-lang/rust-clippy"
 readme = "README.md"
@@ -32,11 +32,7 @@ tempfile = { version = "3.1.0", optional = true }
 cargo_metadata = "0.12"
 compiletest_rs = { version = "0.6.0", features = ["tmp"] }
 tester = "0.9"
-serde = { version = "1.0", features = ["derive"] }
-derive-new = "0.5"
 regex = "1.4"
-quote = "1"
-syn = { version = "1", features = ["full"] }
 # This is used by the `collect-metadata` alias.
 filetime = "0.2"
 
@@ -45,6 +41,15 @@ filetime = "0.2"
 # for more information.
 rustc-workspace-hack = "1.0.0"
 
+# UI test dependencies
+clippy_utils = { path = "clippy_utils" }
+derive-new = "0.5"
+if_chain = "1.0"
+itertools = "0.10.1"
+quote = "1"
+serde = { version = "1.0", features = ["derive"] }
+syn = { version = "1", features = ["full"] }
+
 [build-dependencies]
 rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util" }
 

Diff for: src/tools/clippy/README.md

@@ -45,13 +45,13 @@ or in Travis CI.
 One way to use Clippy is by installing Clippy through rustup as a cargo
 subcommand.
 
-#### Step 1: Install rustup
+#### Step 1: Install Rustup
 
-You can install [rustup](https://rustup.rs/) on supported platforms. This will help
+You can install [Rustup](https://rustup.rs/) on supported platforms. This will help
 us install Clippy and its dependencies.
 
-If you already have rustup installed, update to ensure you have the latest
-rustup and compiler:
+If you already have Rustup installed, update to ensure you have the latest
+Rustup and compiler:
 
 ```terminal
 rustup update

Diff for: src/tools/clippy/clippy_dev/src/lib.rs

@@ -17,7 +17,6 @@ pub mod fmt;
 pub mod new_lint;
 pub mod serve;
 pub mod setup;
-pub mod stderr_length_check;
 pub mod update_lints;
 
 static DEC_CLIPPY_LINT_RE: SyncLazy<Regex> = SyncLazy::new(|| {