Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it. #126455

Merged
merged 1 commit into from
Jun 24, 2024

Conversation

surechen
Copy link
Contributor

For [E0308]: mismatched types, when expr is in an arm's body, and it is the end expr without a semicolon of the block, not add semicolon ';' at the end of it.

fixes #126222

@rustbot
Copy link
Collaborator

rustbot commented Jun 14, 2024

r? @estebank

rustbot has assigned @estebank.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

@rustbot 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 Jun 14, 2024
@rust-log-analyzer

This comment has been minimized.

Comment on lines +20 to +23
help: you might have meant to return this value
|
LL | return dbg!(x)
| ++++++
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I'm somewhat surprised: shouldn't these suggestions include a trailing ;?

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I'm assuming this is because dbg expands to a block expression, right?

Copy link
Contributor Author

@surechen surechen Jun 23, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I'm somewhat surprised: shouldn't these suggestions include a trailing ;?

Thank you.
Here I think because in the return expression after match arm the "; " is unnecessary, and the diagnostic suggestion may make error expr like "return something; ,", so in this case, I recommend using the return something without semicolon ;.
For me, it's not necessary to add ';' here whether it's expanded into a block expr or not. I'm not sure if I'm thinking about this fully. Please help me give an accurate judgement.

Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It is idiomatic for statements like return to be ended with a ;, regardless of whether it is valid code or not. That being said, it doesn't matter as much, as long as the suggestions produce valid code.

@estebank
Copy link
Contributor

@bors r+

@bors
Copy link
Contributor

bors commented Jun 23, 2024

📌 Commit e8b5ba1 has been approved by estebank

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 23, 2024
workingjubilee added a commit to workingjubilee/rustc that referenced this pull request Jun 24, 2024
For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it.

For [E0308]: mismatched types, when expr is in an arm's body, and it is the end expr without a semicolon of the block, not add semicolon ';' at the end of it.

fixes rust-lang#126222

<!--
If this PR is related to an unstable feature or an otherwise tracked effort,
please link to the relevant tracking issue here. If you don't know of a related
tracking issue or there are none, feel free to ignore this.

This PR will get automatically assigned to a reviewer. In case you would like
a specific user to review your work, you can assign it to them by using

    r​? <reviewer name>
-->
bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 24, 2024
…kingjubilee

Rollup of 9 pull requests

Successful merges:

 - rust-lang#126177 (Add hard error and migration lint for unsafe attrs)
 - rust-lang#126298 (Promote loongarch64-unknown-linux-musl to Tier 2 with host tools)
 - rust-lang#126455 (For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it.)
 - rust-lang#126754 (Implement `use<>` formatting in rustfmt)
 - rust-lang#126807 (std::unix::fs: copy simplification for apple.)
 - rust-lang#126845 (Weekly `cargo update`)
 - rust-lang#126849 (Fix 32-bit Arm reg classes by hierarchically sorting them)
 - rust-lang#126854 (std::unix::os::home_dir: fallback's optimisation.)
 - rust-lang#126861 (Migrate `run-make/invalid-library` to `rmake.rs`)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Jun 24, 2024
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#126177 (Add hard error and migration lint for unsafe attrs)
 - rust-lang#126298 (Promote loongarch64-unknown-linux-musl to Tier 2 with host tools)
 - rust-lang#126455 (For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it.)
 - rust-lang#126754 (Implement `use<>` formatting in rustfmt)
 - rust-lang#126807 (std::unix::fs: copy simplification for apple.)
 - rust-lang#126845 (Weekly `cargo update`)
 - rust-lang#126849 (Fix 32-bit Arm reg classes by hierarchically sorting them)
 - rust-lang#126854 (std::unix::os::home_dir: fallback's optimisation.)
 - rust-lang#126888 (Remove stray println from rustfmt's `rewrite_static`)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit ad0531a into rust-lang:master Jun 24, 2024
6 checks passed
@rustbot rustbot added this to the 1.81.0 milestone Jun 24, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Jun 24, 2024
Rollup merge of rust-lang#126455 - surechen:fix_126222, r=estebank

For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it.

For [E0308]: mismatched types, when expr is in an arm's body, and it is the end expr without a semicolon of the block, not add semicolon ';' at the end of it.

fixes rust-lang#126222

<!--
If this PR is related to an unstable feature or an otherwise tracked effort,
please link to the relevant tracking issue here. If you don't know of a related
tracking issue or there are none, feel free to ignore this.

This PR will get automatically assigned to a reviewer. In case you would like
a specific user to review your work, you can assign it to them by using

    r​? <reviewer name>
-->
jaisnan pushed a commit to jaisnan/rust-dev that referenced this pull request Jul 29, 2024
Update Rust toolchain from nightly-2024-06-24 to nightly-2024-06-25
without any other source changes.
This is an automatically generated pull request. If any of the CI checks
fail, manual intervention is required. In such a case, review the
changes at https://github.com/rust-lang/rust from
rust-lang@bcf94de
up to
rust-lang@6b0f4b5.
The log for this commit range is:
rust-lang@6b0f4b5ec3 Auto merge of
rust-lang#126914 - compiler-errors:rollup-zx0hchm, r=compiler-errors
rust-lang@16bd6e25e1 Rollup merge of
rust-lang#126911 - oli-obk:do_not_count_errors, r=compiler-errors
rust-lang@59c258f51f Rollup merge of
rust-lang#126909 - onur-ozkan:add-kobzol, r=matthiaskrgr
rust-lang@85eb835a14 Rollup merge of
rust-lang#126904 - GrigorenkoPV:nonzero-fixme, r=joboet
rust-lang@a7721a0373 Rollup merge of
rust-lang#126899 - GrigorenkoPV:suggest-const-block, r=davidtwco
rust-lang@9ce2a070b3 Rollup merge of
rust-lang#126682 - Zalathar:coverage-attr, r=lcnr
rust-lang@49bdf460a2 Rollup merge of
rust-lang#126673 - oli-obk:dont_rely_on_err_reporting, r=compiler-errors
rust-lang@46e43984d1 Rollup merge of
rust-lang#126413 - matthiaskrgr:crshmsg, r=oli-obk
rust-lang@ed460d2eaa Rollup merge of
rust-lang#125575 - dingxiangfei2009:derive-smart-ptr, r=davidtwco
rust-lang@c77dc28f87 Rollup merge of
rust-lang#125082 - kpreid:const-uninit, r=dtolnay
rust-lang@faa28be2f1 Rollup merge of
rust-lang#124712 - Enselic:deprecate-inline-threshold, r=pnkfelix
rust-lang@00e5f5886a Rollup merge of
rust-lang#124460 - long-long-float:show-notice-about-enum-with-debug, r=pnkfelix
rust-lang@d8d5732456 Auto merge of
rust-lang#126784 - scottmcm:smaller-terminator, r=compiler-errors
rust-lang@13fca73f49 Replace
`MaybeUninit::uninit_array()` with array repeat expression.
rust-lang@5a3e2a4e92 Auto merge of
rust-lang#126523 - joboet:the_great_big_tls_refactor, r=Mark-Simulacrum
rust-lang@45261ff2ec add @Kobzol to
bootstrap team for triagebot
rust-lang@84474a25a4 Small fixme in core
now that NonZero is generic
rust-lang@50a02ed789 std: fix wasm builds
rust-lang@8fc6b3de19 Separate the mir
body lifetime from the other lifetimes
rust-lang@1c4d0ced58 Separate the
lifetimes of the `BorrowckInferCtxt` from the other borrowed items
rust-lang@d371d17496 Auto merge of
rust-lang#126900 - matthiaskrgr:rollup-24ah97b, r=matthiaskrgr
rust-lang@8ffb5f936a compiletest: make
the crash test error message abit more informative
rust-lang@a80ee9159b Rollup merge of
rust-lang#126882 - estebank:multiline-order, r=WaffleLapkin
rust-lang@8bfde609e2 Rollup merge of
rust-lang#126414 - ChrisDenton:target-known, r=Nilstrieb
rust-lang@94b9ea417d Rollup merge of
rust-lang#126213 - zachs18:atomicbool-u8-i8-from-ptr-alignment, r=Nilstrieb
rust-lang@9d24ecc37b Rollup merge of
rust-lang#125241 - Veykril:tool-rust-analyzer, r=davidtwco
rust-lang@ba5ec1fc5c Suggest inline const
blocks for array initialization
rust-lang@06c072f158 Auto merge of
rust-lang#126788 - GuillaumeGomez:migrate-rustdoc-tests-syntax, r=fmease,oli-obk
rust-lang@1852141219 coverage: Bless
coverage attribute tests
rust-lang@b7c057c9b2 coverage: Always
error on `#[coverage(..)]` in unexpected places
rust-lang@a000fa8b54 coverage: Tighten
validation of `#[coverage(off)]` and `#[coverage(on)]`
rust-lang@b5dfeba0e1 coverage: Forbid
multiple `#[coverage(..)]` attributes
rust-lang@6909feab8e Allow numbers in
rustdoc tests commands
rust-lang@4e258bb4c3 Fix tidy issue for
rustdoc tests commands
rust-lang@51fedf65ff Remove commands
duplication between `compiletest` and `tests/rustdoc`
rust-lang@1b67035579 Update
`tests/rustdoc` to new test syntax
rust-lang@d3ec92e16e Move `tests/rustdoc`
testsuite to `//@` syntax
rust-lang@2c243d9570 Auto merge of
rust-lang#126891 - matthiaskrgr:rollup-p6dl1gk, r=matthiaskrgr
rust-lang@b94d2754b5 Rollup merge of
rust-lang#126888 - compiler-errors:oops-debug-printing, r=dtolnay
rust-lang@9892b3e9fe Rollup merge of
rust-lang#126854 - devnexen:std_unix_os_fallback_upd, r=Mark-Simulacrum
rust-lang@3108dfaced Rollup merge of
rust-lang#126849 - workingjubilee:correctly-classify-arm-low-dregs, r=Amanieu
rust-lang@dcace866f0 Rollup merge of
rust-lang#126845 - rust-lang:cargo_update, r=Mark-Simulacrum
rust-lang@21850f5bd8 Rollup merge of
rust-lang#126807 - devnexen:copy_file_macos_simpl, r=Mark-Simulacrum
rust-lang@b24e3df0df Rollup merge of
rust-lang#126754 - compiler-errors:use-rustfmt, r=calebcartwright
rust-lang@ad0531ae0d Rollup merge of
rust-lang#126455 - surechen:fix_126222, r=estebank
rust-lang@7babf99ea9 Rollup merge of
rust-lang#126298 - heiher:loongarch64-musl-ci, r=Mark-Simulacrum
rust-lang@9a591ea1ce Rollup merge of
rust-lang#126177 - carbotaniuman:unsafe_attr_errors, r=jieyouxu
rust-lang@25446c25fc Remove stray println
from rustfmt
rust-lang@d49994b060 Auto merge of
rust-lang#126023 - amandasystems:you-dropped-this-again, r=nikomatsakis
rust-lang@a23917cfd0 Add hard error and
migration lint for unsafe attrs
rust-lang@284437d434 Special case when a
code line only has multiline span starts
rust-lang@f1be59fa72 SmartPointer
derive-macro
rust-lang@a426d6fdf0 Implement use<>
formatting in rustfmt
rust-lang@16fef40896 Promote
loongarch64-unknown-linux-musl to Tier 2 with host tools
rust-lang@03d73fa6ba ci: Add support for
dist-loongarch64-musl
rust-lang@fc50acae90 fix build
rust-lang@bd9ce3e074
std::unix::os::home_dir: fallback's optimisation.
rust-lang@0d8f734172 compiler: Fix arm32
asm issues by hierarchically sorting reg classes
rust-lang@e8b5ba1111 For [E0308]:
mismatched types, when expr is in an arm's body, not add semicolon ';'
at the end of it.
rust-lang@990535723d cargo update
rust-lang@b28efb11af Save 2 pointers in
`TerminatorKind` (96 → 80 bytes)
rust-lang@65530ba100 std::unix::fs: copy
simplification for apple.
rust-lang@339015920d Add `rust_analyzer`
as a predefined tool
rust-lang@3f2f8438b4 Ensure we don't
accidentally succeed when we want to report an error
rust-lang@32f9b8bf76 std: rename module
for clarity
rust-lang@35f050b8da std: update TLS
module documentation
rust-lang@b2f29edc81 std: use the `c_int`
from `core::ffi` instead of `libc`
rust-lang@d70f071392 std: simplify
`#[cfg]`s for TLS
rust-lang@d630f5da7a Show notice about
"never used" for enum
rust-lang@f3facf1175 std: refactor the
TLS implementation
rust-lang@f5f067bf9d Deprecate no-op
codegen option `-Cinline-threshold=...`
rust-lang@651ff643ae Fix typo in
`-Cno-stack-check` deprecation warning
rust-lang@3af624272a rustc_codegen_ssa:
Remove unused ModuleConfig::inline_threshold
rust-lang@34e6ea1446 Tier 2 std support
must always be known
rust-lang@2d4cb7aa5a Update docs for
AtomicU8/I8.
rust-lang@7885c7b7b2 Update safety docs
for AtomicBool::from_ptr.
rust-lang@7b5b7a7010 Remove confusing
`use_polonius` flag and do less cloning

Co-authored-by: tautschnig <1144736+tautschnig@users.noreply.github.com>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

"you might have meant to return this value" suggests invalid syntax
6 participants