[INFO] fetching crate regalloc 0.0.34... [INFO] checking regalloc-0.0.34 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170 [INFO] extracting crate regalloc 0.0.34 into /workspace/builds/worker-2-tc2/source [INFO] started tweaking crates.io crate regalloc 0.0.34 [INFO] finished tweaking crates.io crate regalloc 0.0.34 [INFO] tweaked toml for crates.io crate regalloc 0.0.34 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate regalloc 0.0.34 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 9 packages to latest compatible versions [INFO] [stderr] Adding rustc-hash v1.1.0 (available: v2.1.1) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c7c4838758c91b2fe1828125a000cdec1fd367798f895b04d32533f065fcaec6 [INFO] running `Command { std: "docker" "start" "-a" "c7c4838758c91b2fe1828125a000cdec1fd367798f895b04d32533f065fcaec6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c7c4838758c91b2fe1828125a000cdec1fd367798f895b04d32533f065fcaec6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c7c4838758c91b2fe1828125a000cdec1fd367798f895b04d32533f065fcaec6", kill_on_drop: false }` [INFO] [stdout] c7c4838758c91b2fe1828125a000cdec1fd367798f895b04d32533f065fcaec6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b5aac6acd11776586aed2a197f226e9b99fdc0b9be14dbefb7b100170799f60c [INFO] running `Command { std: "docker" "start" "-a" "b5aac6acd11776586aed2a197f226e9b99fdc0b9be14dbefb7b100170799f60c", kill_on_drop: false }` [INFO] [stderr] Checking smallvec v1.15.1 [INFO] [stderr] Checking regalloc v0.0.34 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/linear_scan/resolve_moves.rs:679:33 [INFO] [stdout] | [INFO] [stdout] 679 | if let Some(mut cycled) = find_cycled_move(stack, &mut stack_cur, blocking) { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | Spill { vreg: Option }, [INFO] [stdout] | ----- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:21:14 [INFO] [stdout] | [INFO] [stdout] 21 | Reload { vreg: Option }, [INFO] [stdout] | ------ ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:22:12 [INFO] [stdout] | [INFO] [stdout] 22 | Move { vreg: VirtualReg }, [INFO] [stdout] | ---- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/lib.rs:223:20 [INFO] [stdout] | [INFO] [stdout] 223 | fn block_succs(&self, block: BlockIx) -> Cow<[BlockIx]>; [INFO] [stdout] | ^^^^^ -------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 223 | fn block_succs(&self, block: BlockIx) -> Cow<'_, [BlockIx]>; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/analysis_main.rs:345:24 [INFO] [stdout] | [INFO] [stdout] 345 | pub(crate) fn iter(&self) -> std::slice::Iter { [INFO] [stdout] | ^^^^^ --------------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 345 | pub(crate) fn iter(&self) -> std::slice::Iter<'_, u32> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:211:17 [INFO] [stdout] | [INFO] [stdout] 211 | pub fn iter(&self) -> SetIter { [INFO] [stdout] | ^^^^^ ---------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 211 | pub fn iter(&self) -> SetIter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:344:17 [INFO] [stdout] | [INFO] [stdout] 344 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ -------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 344 | pub fn iter(&self) -> Iter<'_, Ty> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:347:21 [INFO] [stdout] | [INFO] [stdout] 347 | pub fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^^ ----------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 347 | pub fn iter_mut(&mut self) -> IterMut<'_, Ty> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/linear_scan/assign_registers.rs:285:18 [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter { [INFO] [stdout] | ^^ ---------------------- the lifetime gets resolved as `'a` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter<'a, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/snapshot.rs:227:20 [INFO] [stdout] | [INFO] [stdout] 227 | fn block_succs(&self, block: BlockIx) -> Cow<[BlockIx]> { [INFO] [stdout] | ^^^^^ -------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 227 | fn block_succs(&self, block: BlockIx) -> Cow<'_, [BlockIx]> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/sparse_set.rs:642:17 [INFO] [stdout] | [INFO] [stdout] 642 | pub fn iter(&self) -> SparseSetUIter { [INFO] [stdout] | ^^^^^ ----------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 642 | pub fn iter(&self) -> SparseSetUIter<'_, A> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/linear_scan/resolve_moves.rs:679:33 [INFO] [stdout] | [INFO] [stdout] 679 | if let Some(mut cycled) = find_cycled_move(stack, &mut stack_cur, blocking) { [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | Spill { vreg: Option }, [INFO] [stdout] | ----- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:21:14 [INFO] [stdout] | [INFO] [stdout] 21 | Reload { vreg: Option }, [INFO] [stdout] | ------ ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `vreg` is never read [INFO] [stdout] --> src/snapshot.rs:22:12 [INFO] [stdout] | [INFO] [stdout] 22 | Move { vreg: VirtualReg }, [INFO] [stdout] | ---- ^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IRInstKind` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/lib.rs:223:20 [INFO] [stdout] | [INFO] [stdout] 223 | fn block_succs(&self, block: BlockIx) -> Cow<[BlockIx]>; [INFO] [stdout] | ^^^^^ -------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 223 | fn block_succs(&self, block: BlockIx) -> Cow<'_, [BlockIx]>; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/analysis_main.rs:345:24 [INFO] [stdout] | [INFO] [stdout] 345 | pub(crate) fn iter(&self) -> std::slice::Iter { [INFO] [stdout] | ^^^^^ --------------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 345 | pub(crate) fn iter(&self) -> std::slice::Iter<'_, u32> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:211:17 [INFO] [stdout] | [INFO] [stdout] 211 | pub fn iter(&self) -> SetIter { [INFO] [stdout] | ^^^^^ ---------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 211 | pub fn iter(&self) -> SetIter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:344:17 [INFO] [stdout] | [INFO] [stdout] 344 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ -------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 344 | pub fn iter(&self) -> Iter<'_, Ty> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/data_structures.rs:347:21 [INFO] [stdout] | [INFO] [stdout] 347 | pub fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^^ ----------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 347 | pub fn iter_mut(&mut self) -> IterMut<'_, Ty> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/linear_scan/assign_registers.rs:285:18 [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter { [INFO] [stdout] | ^^ ---------------------- the lifetime gets resolved as `'a` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 285 | fn iter<'a>(&'a self) -> RegisterMappingIter<'a, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/snapshot.rs:227:20 [INFO] [stdout] | [INFO] [stdout] 227 | fn block_succs(&self, block: BlockIx) -> Cow<[BlockIx]> { [INFO] [stdout] | ^^^^^ -------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 227 | fn block_succs(&self, block: BlockIx) -> Cow<'_, [BlockIx]> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/sparse_set.rs:642:17 [INFO] [stdout] | [INFO] [stdout] 642 | pub fn iter(&self) -> SparseSetUIter { [INFO] [stdout] | ^^^^^ ----------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 642 | pub fn iter(&self) -> SparseSetUIter<'_, A> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.24s [INFO] running `Command { std: "docker" "inspect" "b5aac6acd11776586aed2a197f226e9b99fdc0b9be14dbefb7b100170799f60c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b5aac6acd11776586aed2a197f226e9b99fdc0b9be14dbefb7b100170799f60c", kill_on_drop: false }` [INFO] [stdout] b5aac6acd11776586aed2a197f226e9b99fdc0b9be14dbefb7b100170799f60c