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Promotes 5 Thumb-mode bare-metal Arm targets to Tier 2

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#985 In rust-lang/compiler-team;

· cezarbbb opened on Apr 25, 2026

replace box_patterns in the compiler with deref_patterns

final-comment-periodThe FCP has started, most (if not all) team members are in agreementThe FCP has started, most (if not all) team members are in agreement

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#984 In rust-lang/compiler-team;

· cyrgani opened on Apr 23, 2026

Make stable hashing names consistent

final-comment-periodThe FCP has started, most (if not all) team members are in agreementThe FCP has started, most (if not all) team members are in agreement

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#983 In rust-lang/compiler-team;

· nnethercote opened on Apr 19, 2026

Promote riscv64gc-unknown-linux-musl to Tier 2 (with Tools)

final-comment-periodThe FCP has started, most (if not all) team members are in agreementThe FCP has started, most (if not all) team members are in agreement

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#982 In rust-lang/compiler-team;

· eshattow opened on Apr 15, 2026

group target modifier options under -T

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#980 In rust-lang/compiler-team;

· davidtwco opened on Mar 31, 2026

Implement LLVM-backed MC/DC instrumentation in the compiler

meeting-proposal

Status: Open.

#979 In rust-lang/compiler-team;

· RenjiSann opened on Mar 30, 2026

Turn long-deprecated -C options into errors

disposition-mergeThe FCP starter wants to merge thisThe FCP starter wants to merge this

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

proposed-final-comment-periodAn FCP has been started, cast your votes and raise concernsAn FCP has been started, cast your votes and raise concerns

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Status: Open.

#978 In rust-lang/compiler-team;

· RalfJung opened on Mar 28, 2026

Change the ABI of powerpc64-unknown-linux-gnu to ELFv2

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#977 In rust-lang/compiler-team;

· Gelbpunkt opened on Mar 14, 2026

Add -Z dead-fn-elimination to skip codegen of BFS-unreachable functions

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

Status: Open.

#976 In rust-lang/compiler-team;

· yijunyu opened on Mar 13, 2026

Promote loongarch32-unknown-none* to Tier 2

disposition-mergeThe FCP starter wants to merge thisThe FCP starter wants to merge this

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

proposed-final-comment-periodAn FCP has been started, cast your votes and raise concernsAn FCP has been started, cast your votes and raise concerns

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Status: Open.

#968 In rust-lang/compiler-team;

· heiher opened on Feb 13, 2026

Allow crates downstream of rustc_middle to define queries

has-concernsThere are active concernsThere are active concerns

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#966 In rust-lang/compiler-team;

· Zoxc opened on Feb 7, 2026

Add repro-check tool for build reproducibility

major-changeA proposal to make a major change to rustcA proposal to make a major change to rustc

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Status: Open.

#962 In rust-lang/compiler-team;

· windsunil opened on Jan 24, 2026