rustc_parse: Stop returning `Option` from statement parsing by petrochenkov · Pull Request #159849 · rust-lang/rust

petrochenkov · 2026-07-24T15:57:40Z

parse_stmt_without_recovery had one corner case in which it returned Ok(None) - when parsing immediately encountered a closing brace }, possibly after parsing outer attributes.

It is simpler to never call parse_stmt_without_recovery in such contexts than deal with a possibility of no statement being returned without an error.
So this PR changes the function's return type from PResult<'a, Option<Stmt>> to PResult<'a, Stmt> and adjusts one call site to check for a closing brace.

rustbot · 2026-07-24T15:57:51Z

The parser was modified, potentially altering the grammar of (stable) Rust
which would be a breaking change.

cc @fmease

Some changes occurred in compiler/rustc_attr_parsing

cc @jdonszelmann, @JonathanBrouwer

rustbot · 2026-07-24T15:57:56Z

r? @hanna-kruppe

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

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petrochenkov · 2026-07-24T16:01:03Z

        } else if self.eat(exp!(Semi)) {
            // Do not attempt to parse an expression if we're done here.
-            self.error_outer_attrs(attrs);
+            self.error_outer_attrs(attrs)?;


Note: what we did here previously was recovery, which is a bit sus in a function ending with _without_recovery and without checking for may_recover. So we no longer recover now.

View changes since the review

petrochenkov · 2026-07-24T16:02:45Z

-        } else if self.token != token::CloseBrace {
+        } else if self.token == token::CloseBrace {
+            self.error_outer_attrs(attrs)?;
+            self.dcx().span_bug(self.token.span, "don't parse a statement if you see `}`");


Technically this branch is unnecessary, we can just fall through into the last else clause, we'll just get worse error messages like "expected an expression, found }".

View changes since the review

JonathanBrouwer

@bors r+ rollup
This is quite a lot nicer, thanks!

View changes since this review

rust-bors · 2026-07-25T18:42:48Z

📌 Commit 75529d4 has been approved by JonathanBrouwer

It is now in the queue for this repository.

rustc_parse: Stop returning `Option` from statement parsing `parse_stmt_without_recovery` had one corner case in which it returned `Ok(None)` - when parsing immediately encountered a closing brace `}`, possibly after parsing outer attributes. It is simpler to never call `parse_stmt_without_recovery` in such contexts than deal with a possibility of no statement being returned without an error. So this PR changes the function's return type from `PResult<'a, Option<Stmt>>` to `PResult<'a, Stmt>` and adjusts one call site to check for a closing brace.

…uwer Rollup of 24 pull requests Successful merges: - #159638 (bootstrap: Split the `Step` trait into multiple traits) - #159774 (rustc_trait_selection: fix trait solver hang caused by degenerate obligations) - #159837 (line-tables-only test: check that the line number matches the function name) - #159946 (Update Enzyme submodule to imporve llvm-cov) - #159617 (Fix up `#[linkage]` target checking) - #159733 (std: Switch implementations of `thread_local!` for WASI) - #159783 (Check unsafe impls on safe EIIs) - #159810 (Add tuple never coercion collection regression test) - #159821 (Update expect message using the recommended style in binary_heap module) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - #159846 (Implement `str::copy_from_str`) - #159849 (rustc_parse: Stop returning `Option` from statement parsing) - #159853 (Updated expect messages for `CString` struct and method documentation) - #159875 (More cleanup in `rustc_attr_parsing`) - #159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - #159891 (Split multiline derives into std/rustc macros) - #159893 (Fix `find_attr` hygiene and `rustc_hir` cleanups) - #159895 (rustc-dev-guide subtree update) - #159902 (Clarify that the expected runtime symbols signature is for the current target only) - #159914 (Fix error in diagnostic on_unmatched_args) - #159917 (spare capacity mut constification) - #159918 (rename abort_unwind → abort_on_unwind) - #159936 (Minor `rustc_ast::ast` doc cleanups) - #159945 (Update expect messages in library/core/src/ptr/non_null.rs)

…uwer Rollup of 28 pull requests Successful merges: - #159638 (bootstrap: Split the `Step` trait into multiple traits) - #159774 (rustc_trait_selection: fix trait solver hang caused by degenerate obligations) - #159837 (line-tables-only test: check that the line number matches the function name) - #159946 (Update Enzyme submodule to imporve llvm-cov) - #159962 (miri subtree update) - #156570 (tests: extend remap-path-prefix-std to all stdlib rlibs) - #159617 (Fix up `#[linkage]` target checking) - #159633 (Improve workings of attribute suggestions) - #159733 (std: Switch implementations of `thread_local!` for WASI) - #159783 (Check unsafe impls on safe EIIs) - #159810 (Add tuple never coercion collection regression test) - #159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - #159846 (Implement `str::copy_from_str`) - #159849 (rustc_parse: Stop returning `Option` from statement parsing) - #159853 (Updated expect messages for `CString` struct and method documentation) - #159875 (More cleanup in `rustc_attr_parsing`) - #159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - #159891 (Split multiline derives into std/rustc macros) - #159893 (Fix `find_attr` hygiene and `rustc_hir` cleanups) - #159895 (rustc-dev-guide subtree update) - #159902 (Clarify that the expected runtime symbols signature is for the current target only) - #159914 (Fix error in diagnostic on_unmatched_args) - #159917 (spare capacity mut constification) - #159918 (rename abort_unwind → abort_on_unwind) - #159927 (Remove sve2 from the ImpliedFeatures of AArch64 v9a.) - #159936 (Minor `rustc_ast::ast` doc cleanups) - #159945 (Update expect messages in library/core/src/ptr/non_null.rs) - #159950 (Add CFI tests for return types and never type)

Rollup merge of #159849 - petrochenkov:estmt, r=JonathanBrouwer rustc_parse: Stop returning `Option` from statement parsing `parse_stmt_without_recovery` had one corner case in which it returned `Ok(None)` - when parsing immediately encountered a closing brace `}`, possibly after parsing outer attributes. It is simpler to never call `parse_stmt_without_recovery` in such contexts than deal with a possibility of no statement being returned without an error. So this PR changes the function's return type from `PResult<'a, Option<Stmt>>` to `PResult<'a, Stmt>` and adjusts one call site to check for a closing brace.

…uwer Rollup of 28 pull requests Successful merges: - rust-lang/rust#159638 (bootstrap: Split the `Step` trait into multiple traits) - rust-lang/rust#159774 (rustc_trait_selection: fix trait solver hang caused by degenerate obligations) - rust-lang/rust#159837 (line-tables-only test: check that the line number matches the function name) - rust-lang/rust#159946 (Update Enzyme submodule to imporve llvm-cov) - rust-lang/rust#159962 (miri subtree update) - rust-lang/rust#156570 (tests: extend remap-path-prefix-std to all stdlib rlibs) - rust-lang/rust#159617 (Fix up `#[linkage]` target checking) - rust-lang/rust#159633 (Improve workings of attribute suggestions) - rust-lang/rust#159733 (std: Switch implementations of `thread_local!` for WASI) - rust-lang/rust#159783 (Check unsafe impls on safe EIIs) - rust-lang/rust#159810 (Add tuple never coercion collection regression test) - rust-lang/rust#159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - rust-lang/rust#159846 (Implement `str::copy_from_str`) - rust-lang/rust#159849 (rustc_parse: Stop returning `Option` from statement parsing) - rust-lang/rust#159853 (Updated expect messages for `CString` struct and method documentation) - rust-lang/rust#159875 (More cleanup in `rustc_attr_parsing`) - rust-lang/rust#159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - rust-lang/rust#159891 (Split multiline derives into std/rustc macros) - rust-lang/rust#159893 (Fix `find_attr` hygiene and `rustc_hir` cleanups) - rust-lang/rust#159895 (rustc-dev-guide subtree update) - rust-lang/rust#159902 (Clarify that the expected runtime symbols signature is for the current target only) - rust-lang/rust#159914 (Fix error in diagnostic on_unmatched_args) - rust-lang/rust#159917 (spare capacity mut constification) - rust-lang/rust#159918 (rename abort_unwind → abort_on_unwind) - rust-lang/rust#159927 (Remove sve2 from the ImpliedFeatures of AArch64 v9a.) - rust-lang/rust#159936 (Minor `rustc_ast::ast` doc cleanups) - rust-lang/rust#159945 (Update expect messages in library/core/src/ptr/non_null.rs) - rust-lang/rust#159950 (Add CFI tests for return types and never type)

Mark-Simulacrum · 2026-07-27T22:32:27Z

@rust-timer build d1c9ad6

cc upstream perf #159966 (comment)

rust-timer · 2026-07-27T23:50:04Z

Finished benchmarking commit (d1c9ad6): comparison URL.

Overall result: ❌ regressions - please read:

Benchmarking means the PR may be perf-sensitive. It's automatically marked not fit for rolling up. Overriding is possible but disadvised: it risks changing compiler perf.

Next, please: If you can, justify the regressions found in this try perf run in writing along with @rustbot label: +perf-regression-triaged. If not, fix the regressions and do another perf run. Neutral or positive results will clear the label automatically.

@bors rollup=never rustc-perf
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.2%, 0.3%]	6
Regressions ❌ (secondary)	0.4%	[0.3%, 0.6%]	8
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.2%	[0.2%, 0.3%]	6

Max RSS (memory usage)

Results (primary 2.4%, secondary 3.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	2.4%	[2.4%, 2.4%]	1
Regressions ❌ (secondary)	3.0%	[3.0%, 3.0%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.4%	[2.4%, 2.4%]	1

Cycles

This perf run didn't have relevant results for this metric.

Binary size

This perf run didn't have relevant results for this metric.

Bootstrap: 489.277s -> 492.066s (0.57%)
Artifact size: 387.73 MiB -> 387.74 MiB (0.00%)

petrochenkov · 2026-07-28T17:28:49Z

Cachegrind diff from tt-muncher:

10,033,695  ???:<rustc_expand::expand::MacroExpander>::fully_expand_fragment
   -48,000  ???:core::ptr::drop_glue::<alloc::boxed::Box<rustc_ast::ast::Expr>>
    40,800  ???:core::ptr::drop_glue::<rustc_ast::ast::ExprKind>
   -26,403  ???:<rustc_expand::mbe::macro_rules::ParserAnyMacro>::make
    18,120  ???:<rustc_expand::expand::InvocationCollector as rustc_ast::mut_visit::MutVisitor>::visit_expr
   -17,602  ???:<rustc_parse::parser::Parser>::parse_full_stmt
    14,302  ???:<rustc_resolve::Resolver>::resolve_path_with_ribs
    13,200  ???:<rustc_ast::ast::Expr as rustc_ast::mut_visit::MutWalkable<rustc_expand::placeholders::PlaceholderExpander>>::walk_mut
   -12,381  ???:<rustc_expand::expand::InvocationCollector as rustc_ast::mut_visit::MutVisitor>::flat_map_stmt
   -10,748  ???:<rustc_hir::hir::QPath as rustc_data_structures::stable_hash::StableHash>::stable_hash::<rustc_middle::ich::StableHashState>

No idea what's going on.

…uwer Rollup of 28 pull requests Successful merges: - rust-lang/rust#159638 (bootstrap: Split the `Step` trait into multiple traits) - rust-lang/rust#159774 (rustc_trait_selection: fix trait solver hang caused by degenerate obligations) - rust-lang/rust#159837 (line-tables-only test: check that the line number matches the function name) - rust-lang/rust#159946 (Update Enzyme submodule to imporve llvm-cov) - rust-lang/rust#159962 (miri subtree update) - rust-lang/rust#156570 (tests: extend remap-path-prefix-std to all stdlib rlibs) - rust-lang/rust#159617 (Fix up `#[linkage]` target checking) - rust-lang/rust#159633 (Improve workings of attribute suggestions) - rust-lang/rust#159733 (std: Switch implementations of `thread_local!` for WASI) - rust-lang/rust#159783 (Check unsafe impls on safe EIIs) - rust-lang/rust#159810 (Add tuple never coercion collection regression test) - rust-lang/rust#159826 (Remove redundant `#[rustc_paren_sugar]` feature gate) - rust-lang/rust#159846 (Implement `str::copy_from_str`) - rust-lang/rust#159849 (rustc_parse: Stop returning `Option` from statement parsing) - rust-lang/rust#159853 (Updated expect messages for `CString` struct and method documentation) - rust-lang/rust#159875 (More cleanup in `rustc_attr_parsing`) - rust-lang/rust#159882 (Update expect messages in library/alloc/boxed.rs and library/alloc/string.rs to follow the style guide) - rust-lang/rust#159891 (Split multiline derives into std/rustc macros) - rust-lang/rust#159893 (Fix `find_attr` hygiene and `rustc_hir` cleanups) - rust-lang/rust#159895 (rustc-dev-guide subtree update) - rust-lang/rust#159902 (Clarify that the expected runtime symbols signature is for the current target only) - rust-lang/rust#159914 (Fix error in diagnostic on_unmatched_args) - rust-lang/rust#159917 (spare capacity mut constification) - rust-lang/rust#159918 (rename abort_unwind → abort_on_unwind) - rust-lang/rust#159927 (Remove sve2 from the ImpliedFeatures of AArch64 v9a.) - rust-lang/rust#159936 (Minor `rustc_ast::ast` doc cleanups) - rust-lang/rust#159945 (Update expect messages in library/core/src/ptr/non_null.rs) - rust-lang/rust#159950 (Add CFI tests for return types and never type)

Pkgsrc changes: * Adapt to changes in vendored crate versions. * Version & checksum changes. Upstream changes: Version 1.99.0 (2026-10-01) ========================== Language -------- - [Add allow-by-default `raw_borrows_via_references` lint that checks for references that decay immediately into raw borrows](rust-lang/rust#138230) - [Extend `unconditional_panic` lint to function calls that panic when the chunks/windows size is zero] (rust-lang/rust#153563) - [Stabilize C-variadic function definitions] (rust-lang/rust#155697) - [Stabilize the ability to use `#[unsafe(naked)]` functions to define C-variadic functions (`#![feature(c_variadic_naked_functions)]`).] (rust-lang/rust#159746) - [Trait methods are now resolved on an adjusted never type (producing a FCW)] (rust-lang/rust#156047) - [Coerce from inference variables to trait objects if the inference variable is related via subtyping to a type that is known to be `Sized`] (rust-lang/rust#157820) - [Stabilize `#[my_macro] mod foo;`] (rust-lang/rust#157857). This allows outlined modules (`mod foo;`) anywhere in the body of a custom attribute or derive macro. - [Fix the `overflowing_literals` lint with repeated negation] (rust-lang/rust#158302). For instance, it will now no longer lint on `--128_i8`, which is already detected by the `arithmetic_overflow` lint. - [Add POSIX symbols to the `invalid_runtime_symbol_definitions` and `suspicious_runtime_symbol_definitions` lints] (rust-lang/rust#158522) - [Lint unused `#[path]` attributes on inline modules] (rust-lang/rust#158835) - [Enable `unreachable_cfg_select_predicates` lint as part of `unused` lint group] (rust-lang/rust#159179) - [Stabilize passing 128-bit integers via vector registers with `asm!` on x86] (rust-lang/rust#159525) - [Explicitly document that some allocations are allowed to grow in-place (but none are allowed to shrink)] (rust-lang/rust#159729) - We now [guarantee] (rust-lang/rust#159730) that the contents of an `UnsafeCell` can be accessed without going through `get` - [The `invalid_reference_casting` lint was adjusted accordingly] (rust-lang/rust#159960) - [Account for globally enabled target features in `global_asm!`] (rust-lang/rust#160594) - [Warn if an invalid `doc` attribute is used on a macro invocation] (rust-lang/rust#161003) Compiler -------- - [Convert `-Ctarget-cpu` into a target-modifier for AVR, AMDGCN and NVPTX] (rust-lang/rust#150732) - [Enable `static_position_independent_executables` on all gnu and musl targets] (rust-lang/rust#158510) - When providing a suggestion about a missing method, rustc now prefers an exactly matching name from a [doc alias attribute] (https://doc.rust-lang.org/rustdoc/advanced-features.html#add-aliases-for-an-item-in-documentation-search) over a similarity search from other method names. If your new users sometimes expect a method under a different name, adding a doc alias will now help them find it via rustc suggestions, in addition to helping them find it via rustdoc search: [When suggesting method names, prefer *exact* doc aliases over similar names](rust-lang/rust#160369) Platform Support ---------------- - [Promote `riscv64-unknown-linux-musl` to Tier 2 with host tools] (rust-lang/rust#158766) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html Libraries --------- - Iteration on `RangeInclusive` (`a..=b` ranges) is now [optimized better in some circumstances] (rust-lang/rust#155114). As a side effect of this, the behavior of `RangeInclusive` values that has already been exhausted (as an iterator) has changed. For example, the return values of `start()` and `end()` on such ranges may return different values, and using such ranges as slice indexes may have different behavior. These behaviors were not guaranteed to be stable, so these changes are considered to not be breaking changes. - [Relax `transmute_copy` to accept `?Sized` types] (rust-lang/rust#155989) - [Update `transmute_copy` to use a non-unwinding panic] (rust-lang/rust#155989) - [Don't escape U+FF9E and U+FF9F in `escape_debug_ext`] (rust-lang/rust#158057) - [Re-export `core::fmt::NumBuffer` in `alloc` (and `std`)] (rust-lang/rust#161430) Stabilized APIs --------------- - [`IntoIterator` for `Box<[T; N]>`] (https://doc.rust-lang.org/stable/std/iter/trait.IntoIterator.html#impl-IntoIterator-for-Box%3C%5BT;+N%5D,+A%3E) - [`IntoIterator` for `&Box<[T; N]>`] (https://doc.rust-lang.org/stable/std/iter/trait.IntoIterator.html#impl-IntoIterator-for-%26Box%3C%5BT;+N%5D,+A%3E) - [`IntoIterator` for `&mut Box<[T; N]>`] (https://doc.rust-lang.org/stable/std/iter/trait.IntoIterator.html#impl-IntoIterator-for-%26mut+Box%3C%5BT;+N%5D,+A%3E) - [`VecDeque::retain_back`] (https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.retain_back) - [`core::ffi::VaList`] (https://doc.rust-lang.org/stable/core/ffi/struct.VaList.html) - [`Box::into_non_null`] (https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.into_non_null) - [`Box::from_non_null`] (https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.from_non_null) - [`Vec::into_parts`] (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.into_parts) - [`Vec::from_parts`] (https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.from_parts) - [`core::mem::size_of_val_raw`] (https://doc.rust-lang.org/stable/core/mem/fn.size_of_val_raw.html) - [`core::mem::align_of_val_raw`] (https://doc.rust-lang.org/stable/core/mem/fn.align_of_val_raw.html) - [`core::alloc::Layout::for_value_raw`] (https://doc.rust-lang.org/stable/core/alloc/struct.Layout.html#method.for_value_raw) - [`String::from_utf8_lossy_owned`] (https://doc.rust-lang.org/stable/std/string/struct.String.html#method.from_utf8_lossy_owned) - [`string::FromUtf8Error::into_utf8_lossy`] (https://doc.rust-lang.org/stable/std/string/struct.FromUtf8Error.html#method.into_utf8_lossy) - [`FusedIterator for StepBy<I>`] (https://doc.rust-lang.org/stable/std/iter/struct.StepBy.html#impl-FusedIterator-for-StepBy%3CI%3E) - [`std::fs::set_times`] (https://doc.rust-lang.org/stable/std/fs/fn.set_times.html) - [`std::fs::set_times_nofollow`] (https://doc.rust-lang.org/stable/std/fs/fn.set_times_nofollow.html) Cargo ----- - Add a new built-in profile `debug`. This is a preparation for transitioning the `dev` profile away from debugging to give a saner default for faster development iterations. Currently there is no difference between `dev` and `debug` profiles. [docs] (https://doc.rust-lang.org/nightly/cargo/reference/profiles.html#debug-1) [#17214] (rust-lang/cargo#17214) - Workspace members on edition 2024 or later can now override an inherited workspace dependency's `default-features` field. For example, `serde = { workspace = true, default-features = false }` now turns off default features even when the workspace definition enables them. On earlier editions, `default-features = false` is ignored with a warning. ([RFC 3945] (rust-lang/rfcs#3945)) [#17126](rust-lang/cargo#17126) - Incremental compilation is now disabled by default when running in CI. CI is detected via the CI environment variable. [#17220] (rust-lang/cargo#17220) See also the [full Cargo changelog] (https://doc.rust-lang.org/nightly/cargo/CHANGELOG.html#cargo-199-2026-10-01) Rustdoc ----- - [Add new `unused_footnote_definition` rustdoc lint] (rust-lang/rust#137858) - Smarter filtering of trait impls yields performance improvements of 20% on average and up to 40% on some real-world crates. ([1] (rust-lang/rust#159623), [2](rust-lang/rust#159721), [3](rust-lang/rust#159779), [4](rust-lang/rust#159854), [5](rust-lang/rust#159091)) Compatibility Notes ------------------- - [Fully deprecate the legacy integral modules] (rust-lang/rust#146882). For example, `std::i32::MAX` should be accessed via `i32::MAX` instead. - [Upgrade `no_mangle_generic_items` into hard error] (rust-lang/rust#154585) - [The `Pin::new_unchecked` has had its safety invariants changed slightly] (rust-lang/rust#156935) - [Do not promote references to extern statics] (rust-lang/rust#157641) - [Ensure that the inferred types of `let` patterns typecheck] (rust-lang/rust#157841) - [hermit/fs: Return `unsupported()` instead of `from_raw_os_error(22)`] (rust-lang/rust#158247) - [Fixed a bug where `#[repr(simd)]` was accidentally allowed on macro invocations on stable Rust] (rust-lang/rust#158523) - [Abort const-eval when there are generics in the type of the value being produced] (rust-lang/rust#159504) - [Attributes not applying to anything are now an error in code blocks in doc comments] (rust-lang/rust#159849) - [`Box::leak`: tell people to avoid unleaking] (rust-lang/rust#160323) - [PowerPC inline ASM: Fix scalar floats being in the wrong vector lane on little endian] (rust-lang/rust#160441) - [Do not take `doc(cfg())` into account when filtering doctests] (rust-lang/rust#159014) - [Infer anonymous lifetimes in the types of associated consts as `'static`] (rust-lang/rust#156508) - Macros that expand to a semicolon now produce a warning lint (`semicolon_in_expressions_from_non_local_macros`) even when the macro comes from another crate. Previously, such warnings only appeared for macros from the same crate, to avoid showing warnings that can't be fixed locally; however, this masked problems, as integration tests from the crate providing the macro get compiled as a separate crate, so tests often wouldn't reveal this issue. If you encounter a lint like this, please make sure to report it to the crate providing the macro so they can fix it; don't just silence it in your own crate. - [`semicolon_in_expressions_from_macros`: Lint on non-local macros too] (rust-lang/rust#159222) - [Split non-local `semicolon_in_expressions_from_macros` into a separate lint] (rust-lang/rust#159700) Internal Changes ---------------- These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Update to LLVM 23] (rust-lang/rust#158734)

rustc_parse: Stop returning Option from statement parsing

75529d4

rustbot added A-attributes Area: Attributes (`#[…]`, `#![…]`) 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 Jul 24, 2026

rustbot assigned hanna-kruppe Jul 24, 2026

petrochenkov commented Jul 24, 2026

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JonathanBrouwer assigned JonathanBrouwer and unassigned hanna-kruppe Jul 24, 2026

rustbot assigned nnethercote and unassigned JonathanBrouwer Jul 25, 2026

hanna-kruppe assigned JonathanBrouwer and unassigned nnethercote Jul 25, 2026

JonathanBrouwer approved these changes Jul 25, 2026

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rust-bors Bot 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 Jul 25, 2026

JonathanBrouwer mentioned this pull request Jul 25, 2026

Rollup of 15 pull requests #159925

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JonathanBrouwer mentioned this pull request Jul 25, 2026

Rollup of 14 pull requests #159931

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JonathanBrouwer mentioned this pull request Jul 26, 2026

Rollup of 25 pull requests #159952

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Rollup of 24 pull requests #159957

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JonathanBrouwer mentioned this pull request Jul 26, 2026

Rollup of 28 pull requests #159966

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rust-bors Bot merged commit d01433c into rust-lang:main Jul 27, 2026
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rustbot added the perf-regression Performance regression. label Jul 27, 2026

chenyukang mentioned this pull request Jul 30, 2026

[ICE]: don't parse a statement if you see '}' #160171

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jnkel mentioned this pull request Sep 3, 2026

1.99 beta crater regression with two doc comments in one line #162129

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theemathas mentioned this pull request Sep 4, 2026

1.99 beta crater regression: expected item after attributes #162131

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JonathanBrouwer added the relnotes Marks issues that should be documented in the release notes of the next release. label Sep 18, 2026

rustbot mentioned this pull request Sep 18, 2026

Tracking issue for release notes of #159849: rustc_parse: Stop returning Option from statement parsing #162955

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rustc_parse: Stop returning `Option` from statement parsing - #159849

rustc_parse: Stop returning `Option` from statement parsing#159849
rust-bors[bot] merged 1 commit into
rust-lang:mainfrom
petrochenkov:estmt

petrochenkov commented Jul 24, 2026

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petrochenkov commented Jul 24, 2026

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rust-timer commented Jul 27, 2026

Overall result: ❌ regressions - please read:

Instruction count

Max RSS (memory usage)

Cycles

Binary size

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