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Tracking Issue: Polonius Alpha on nightly
#160456 · jackh726 opened on Aug 3, 2026
1
Next-generation trait solver enabled on nightly
#160895 · lcnr opened on Aug 11, 2026
8
Draft release notes for 1.100.0
#163811 · BoxyUwU opened on Oct 5, 2026
5

1.99 regression: u128 code with opt-level=3 + debuginfo=2 + overflow checks consumes ~inf memory
rust-lang/rust#164326 · opened on Oct 14, 2026
2
Tracking issue for release notes of #159374: Lower #[no_mangle] to #[symbol_name]/#[link_name]
rust-lang/rust#164323 · opened on Oct 14, 2026
rustc caught SIGSEGV and gave a pretty stacktrace
rust-lang/rust#164321 · opened on Oct 14, 2026
2
Methods with arbitrary self types should be duplicated across libstd docs
rust-lang/rust#164320 · opened on Oct 14, 2026
2
ICE on const fn param of type ... (C-variadics)
rust-lang/rust#164319 · opened on Oct 14, 2026
2
Incorrect span on unsatisfied higher ranked bound
rust-lang/rust#164312 · opened on Oct 14, 2026
libdisplaydoc.so function misaligns stack
rust-lang/rust#164311 · opened on Oct 14, 2026
1
Unsoundness with min_specialization and non-WF HRTB
rust-lang/rust#164306 · opened on Oct 14, 2026
Compiler hangs at -C opt-level=3 with -C target-cpu=x86-64-v3
rust-lang/rust#164299 · opened on Oct 14, 2026
Crash on an i128 accumulation loop at -C opt-level=3 with AVX2
rust-lang/rust#164298 · opened on Oct 14, 2026
1
Miscompilation with -C lto=fat: impossible "index out of bounds: the len is 8 but the index is 0"
rust-lang/rust#164297 · opened on Oct 14, 2026
2
Miscompilation: loop counter off by one after a vectorized loop at -O
rust-lang/rust#164295 · opened on Oct 14, 2026
rustdoc: redundant_explicit_links is reported with no location when a module has /// docs in the parent file and //! docs in its own file
rust-lang/rust#164282 · opened on Oct 13, 2026
1.98 Build speed regression - GNU ld on arm
rust-lang/rust#164275 · opened on Oct 13, 2026
5
binary with panic="immediate-abort" still links in __rustc::rust_begin_unwind() which stores garbage
rust-lang/rust#164274 · opened on Oct 13, 2026
3
process::exit() + thread-locals can deadlock due to unique_thread_exit()
rust-lang/rust#164273 · opened on Oct 13, 2026
4
Missing optimisation opportunity for async function unused variable is copied.
rust-lang/rust#164270 · opened on Oct 13, 2026
4
Non-valid LLVM IR generated with -Z virtual-function-elimination
rust-lang/rust#164267 · opened on Oct 13, 2026
1
Weird overlapping spans for "hidden type for captures lifetime" diagnostic (E0700)
rust-lang/rust#164265 · opened on Oct 13, 2026
*-kmc-solid_*: std's sockaddr_storage too small for sockaddr_in6
rust-lang/rust#164251 · opened on Oct 13, 2026
2
struct's lifetime requirements can be bypassed via covariant field assignment
rust-lang/rust#164250 · opened on Oct 13, 2026
13
fs::Dir::remove_file and remove_dir remove the target of a symlink on Windows
rust-lang/rust#164249 · opened on Oct 13, 2026
1
TransmuteFrom::<_, Assume::NOTHING> can transmute references to types with interior mutability
rust-lang/rust#164247 · opened on Oct 13, 2026
1
Assume::NOTHING doesn't check lifetimes
rust-lang/rust#164246 · opened on Oct 13, 2026
Stack frame regression in Rust 1.99
rust-lang/rust#164245 · opened on Oct 13, 2026
2

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Issues

1.99 regression: `u128` code with `opt-level=3` + `debuginfo=2` + overflow checks consumes ~inf memory

Tracking issue for release notes of #159374: Lower #[no_mangle] to #[symbol_name]/#[link_name]

rustc caught SIGSEGV and gave a pretty stacktrace

Methods with arbitrary self types should be duplicated across libstd docs

ICE on const fn param of type `...` (C-variadics)

Incorrect span on unsatisfied higher ranked bound

libdisplaydoc.so function misaligns stack

Unsoundness with min_specialization and non-WF HRTB

Compiler hangs at `-C opt-level=3` with `-C target-cpu=x86-64-v3`

Crash on an `i128` accumulation loop at `-C opt-level=3` with AVX2

Miscompilation with `-C lto=fat`: impossible "index out of bounds: the len is 8 but the index is 0"

Miscompilation: loop counter off by one after a vectorized loop at `-O`

rustdoc: `redundant_explicit_links` is reported with no location when a module has `///` docs in the parent file and `//!` docs in its own file

1.98 Build speed regression - GNU ld on arm

binary with panic="immediate-abort" still links in __rustc::rust_begin_unwind() which stores garbage

process::exit() + thread-locals can deadlock due to unique_thread_exit()

Missing optimisation opportunity for async function unused variable is copied.

Non-valid LLVM IR generated with `-Z virtual-function-elimination`

Weird overlapping spans for "hidden type for captures lifetime" diagnostic (E0700)

-kmc-solid_: std's sockaddr_storage too small for sockaddr_in6

struct's lifetime requirements can be bypassed via covariant field assignment

`fs::Dir::remove_file` and `remove_dir` remove the target of a symlink on Windows

TransmuteFrom::<_, Assume::NOTHING> can transmute references to types with interior mutability

Assume::NOTHING doesn't check lifetimes

Stack frame regression in Rust 1.99